unique_id stringlengths 2 7 | problem stringlengths 9 11.6k | answer stringlengths 0 2.49k | answer_type stringclasses 11
values | category stringclasses 16
values | difficulty stringclasses 5
values |
|---|---|---|---|---|---|
244873 | Why does my stability analysis of the transcritical bifurcation $g_{\alpha}(x) = (1+\alpha)x-x^2$ at the fixed point $x=0$ (using the condition $|g'_{\alpha}(x=0)|<1$) give a stability condition of $-2<\alpha<0$, while my lecturer claims the fixed point $x=0$ is stable for $\alpha<0$? | $\alpha < 0$ | Expression | Mathematics | University |
237282 | Calculate the volume of the solid bounded by the sphere {eq}x^2+y^2 + z^2 = 3^2{/eq} and the cone {eq}z = \sqrt{x^2+y^2}{/eq} | 16.563 | Float | Mathematics | University |
58057 | What are the points of inflection, if any, of f(x)=x^4/(x^3+6)? | (root(3)12, (2root(3)12)/3) | Expression | Mathematics | University |
1645411 | Which of the following is added to FIFO EUP to derive weighted average EUP?
A. Beginning WIP EUP completed in prior period
B. Beginning WIP EUP produced in current period
C. Ending WIP EUP not completed
D. Ending WIP EUP completed | B | Multiple Choice | Business | University |
1485222 | At time {eq}t = 0
{/eq}, a particle is located at the point {eq}(5, 2, 4)
{/eq}. It travels in a straight line to the point {eq}(7, 5, 6)
{/eq}, has speed {eq}2
{/eq} at {eq}(5, 2, 4)
{/eq} and constant acceleration {eq}2\vec{i} + 3\vec{j} + 2\vec{k}
{/eq}. Find an equation for the position vector {eq}\vec{r}(t)
... | <5+(4t)/sqrt(17)+t^2, 2+(6t)/sqrt(17)+1.5t^2, 4+(4t)/sqrt(17)+t^2> | Expression | Physics | University |
342856 | What relationship exists between the Magnetic Force and Magnetic Field? Write a proportionality expression that represents the relationship between Magnetic Force and Magnetic Field. | F=qvB | Expression | Physics | Senior High School |
549655 | Show that there exists a $3 \times 3$ invertible matrix $M$ (which is not the identity matrix) with entries in the field $\mathbb{Z}/2\mathbb{Z}$ such that $M^7 =$ Identity matrix. | $A=\left(\begin{matrix}0&0&1\\0&1&1\\1&1&0\end{matrix}\right)$ | Matrix | Mathematics | University |
393390 | Tuttle Enterprises is considering a project that has the followingcash flow and WACC data. What is the project's NPV? Note that if a project's projected NPV is negative, it should be rejected.
WACC: 6.50%
Year 0 Cash outflow = -$1,000;
Year 1 Cash inflow = $350;
Year 2 Cash inflow = $350;
Year 3 Cash inflow = $350... | $199.02 | Float | Business | University |
1198761 | C is the boundary of the portion of the paraboloid y = 4 - x^2 - z^2 with y > 0, n to the right, F = <x^2z,3cosy,4z^2>. Use Stokes theorem to evaluate integral F.Dr | -4pi | Float | Mathematics | University |
1865078 | If a population of plants starts in Hardy-Weinbery Equilibrium with allele frequencies of p=q=0.5. Make a chart of expected genotype frequencies for 3 generations where all individuals in each subsequent generation is the result of selfing | Generation 1: Homozygous "p": 0.25, Heterozygotes: 0.5, Homozygous "q": 0.25
Generation 2: Homozygous "p": 0.375, Heterozygotes: 0.25, Homozygous "q": 0.375
Generation 3: Homozygous "p": 0.4375, Heterozygotes: 0.125, Homozygous "q": 0.4375 | List | Biology | University |
1262111 | Strontium has four naturally occurring isotopes: {eq}^{84}Sr, \ ^{86}Sr, \ ^{87}Sr, \ and \ ^{88}Sr{/eq}. Three of the isotopes are listed with the atomic mass followed by their natural abundance in parentheses. {eq}^{84}Sr \ (83.913 amu, \ 0.56%), \ ^{86}Sr \ (85.909 amu, \ 9.66%), \ and \ ^{87}Sr \ (86.909 amu, \ 7.0... | 87.905 amu | Float | Chemistry | Senior High School |
1882517 | There was a burglary on 3/10/15 at Dillon's Camping Equipment. It is unclear how many items were stolen. Dillon and its insurance company are currently working to estimate the dollar value of the stolen goods in order to reach a financial settlement under the existing property insurance policy. Dillon's tax return prep... | $26,667 | Float | Business | University |
1588667 | Which of the following could you say with 95% confidence was the average spent on books by these 50 students?
A. $170 plus or minus $3.46
B. $170 plus or minus $5.95
C. $170 plus or minus $8.42
D. None of these is correct. | B | Multiple Choice | Mathematics | University |
2038063 | John has been working as a tutor for $300 a semester. When the university raises the price it pays tutors to $400, Jasmine enters the market and begins tutoring as well. How much does producer surplus rise as a result of this price increase?
a. by less than $100
b. between $100 and $200
c. between $200 and $300
d. ... | b | Multiple Choice | Economics | University |
1933613 | State true or false and justify your answer:
The expansion path gives the input combinations that minimize the average cost of producing various levels of output. | True | Boolean | Economics | University |
1167814 | If a higher education official claims that the best way to approach drug prevention is to build the resistance skills that are lacking, the official is advocating which drug prevention model? | Social influences model | String | Health | Senior High School |
1191100 | What is the total charge of the nucleus of a nitrogen atom? | +7 | Integer | Chemistry | Junior High School |
1075402 | How is it possible to get a DNA clone, from a cDNA library, given that series of cDNA are provided? | Design primers with restriction digestion sites, amplify the gene of interest from cDNA using PCR, digest the expression vector with the same enzymes, ligate the amplified product with the digested vector, and transform into competent E. coli to obtain the desired clone. | List | Biology | University |
979730 | Are there any simple functions $\beta(x)$ that satisfy the integral $$\int_{y-1}^{y} \beta(x) dx =\cos(y)$$ and can be expressed using only elementary functions? | $\beta (x) = -\frac{1}{2} \left(\sin(x) + \frac{\sin(1)}{\cos(1) -1} \cos(x) \right)$ | Expression | Mathematics | University |
375864 | Vulcan Flyovers offers scenic overflights of Mount St. Helens, the volcano in Washington State that explosively erupted in 1982. Data concerning the company's operations in July appear below:
Vulcan Flyovers
Operating Data
For the Month Ended July 31
Actual ResultsFlexible BudgetPlanning Budget
Flights (q)48 48 50
R... | Flights (q) = 48 (Actual), 48 (Flexible), 50 (Planning)
Revenue ($320.00q) = $13,650 (Actual), $15,360 (Flexible), $16,000 (Planning) with variances 1710 U and 640 U respectively.
Expenses:
Wages and salaries ($4,000 + $82.00q) = 8,430 (Actual), 7,936 (Flexible), 8,100 (Planning) with variances 494 U and 164 F respect... | List | Business | University |
2004214 | If government officials were most concerned about protecting consumers from higher prices, they would favor imposing taxes on goods
A. that are necessities.
B. that are luxuries.
C. for which the tax is likely to be forward shifted.
D. for which the tax cannot be backward shifted. | B | Multiple Choice | Economics | Senior High School |
1458595 | Use an integrating factor to find the general solution of the differential equation {eq}\frac{dy}{dx} - (\frac{2}{x} - 2)y = x^3{/eq} | y=\frac{1}{2}x^3-\frac{1}{4}x^2+Cx^2e^{-2x} | Expression | Mathematics | University |
1595750 | A television set costs $500 in the United States. The same set costs 550 euros in France. If purchasing power parity holds, what is the spot exchange rate between the euro and the dollar? | 0.91 euro per 1 USD | Float | Economics | University |
1903039 | How do plants contribute to moisture in the air? | Transpiration | String | Biology | Junior High School |
2027601 | A step-down transformer is needed to reduce a primary voltage of 120 V AC to 6.0 V AC. What turns ratio is required? | 20 | Integer | Physics | Senior High School |
1986759 | Watters Umbrella Corp. issued 20-year bonds 2 years ago at a coupon rate of 6.4%. The bonds make semiannual payments If these bonds currently sell for 110% of par value, what is the YTM? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) | 5.57% | Percentage | Business | University |
1336442 | What two factors determine the shape of a protein? | The primary structure (sequence of amino acids) | List | Biology | Senior High School |
2047659 | The tubercle found on the neck of a rib articulates with a facet found on the | transverse process of a thoracic vertebra | String | Biology | Senior High School |
328790 | The dye dilution method is used to measure cardiac output with 6 mg of dye. The dye concentration, in mg/L. are modeled by {eq}c(t)\ =\ 20.\ t.e^{-0.6t},\ 0\leq\ t\leq10, {/eq} where {eq}t {/eq} is measured in seconds. Find the cardiac output. | 0.11 L/s | Float | Mathematics | University |
1153995 | If $$x + \mathcal{N}(0,\,1) = 6$$ $$y + \mathcal{N}(0,\,1) = 7.5$$ $$\left|{y-x}\right| < 1$$ then what is the median of $y$? | 7.5 | Float | Mathematics | University |
1174022 | Determine whether or not the vector field is conservative. If it is conservative, find a function f such that F = ∇f. (If the vector field is not conservative, enter DNE.)
F(x, y, z) = y cos(xy)i + x cos(xy) j - 6 sin(z) k. | f(x,y,z) = sin(xy) + 6cos(z) + c | Expression | Mathematics | University |
142200 | A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3.00 m long. What is the tension in each rope when the 700-N worker stands 1.00 m from one end? | The tension in the rope at point A is 567 N and the tension in the rope at point B is 333.3 N | Float | Physics | Senior High School |
1048426 | Represent the function {eq}F(t) = \left\{\begin{matrix}
1 & t \lt \pi \\
3 \cos(2t) & \pi \leq t \lt 2\pi \\
t^2 & t \geq 2\pi
\end{matrix}\right.
{/eq} in terms of the step function and then find the Laplace transform. | F(s)=(1/s)-[exp(-πs)/s]+[3s exp(-πs)/(s^2+4)]-[3s exp(-2πs)/(s^2+4)]+[2 exp(-2πs)/s^3]+[4π^2 exp(-πs)/s]+[4π exp(-2πs)/s^2] | Expression | Mathematics | University |
94756 | Find the derivative of the function: {eq}G(x) = \sqrt {1-9x^2} . \arccos (3x){/eq} | - 3 - \frac{9 x \cos^{-1} 3x}{\sqrt{1 - 9 x^2}} | Expression | Mathematics | University |
2059160 | The minimum uncertainty in the position of a certain moving particle is equal to its de Broglie wavelength. If the speed of the particle is 1.2 x {eq}10^5
{/eq} m/s, what is the minimum uncertainty in the speed? | 9.55e+3 m/s | Float | Physics | University |
1013978 | _____ were a product of Neolithic culture.
A. Wild figs.
B.Domesticated dogs.
C.Boats with sails.
D.Steel plows | B | Multiple Choice | History | Junior High School |
909741 | Calculate the pH of a 0.60 M KOH solution. | 14 | Integer | Chemistry | Senior High School |
668771 | An electron is launched at a 30 degree angle with respect to the horizontal and a speed of {eq}3.0 \times 10^6
{/eq} m/s from the positive plate of the parallel plate capacitor. The plates of the capacitor are oriented horizontally. The electron lands 5 cm away from the point of release. What is the electric field str... | 886.6 N/C | Float | Physics | University |
571117 | How can I solve the trigonometric equation $y - \sin y = 1$ for $y$? | 1.93456 | Float | Mathematics | University |
1642202 | Which of the following practices is most likely to undermine interperiod equity?
a. Paying for a new school building out of current operating funds.
b. Paying the administrative staff of a school out of current operating funds.
c. Issuing 20-year bonds to finance construction of a new highway.
d. Recognizing gains ... | a | Multiple Choice | Business | University |
657774 | In lab, your instructor generates a standing wave using a thin string of length L = 1.50 m fixed at both ends. You are told that the standing wave is produced by the superposition of traveling and reflected waves, where the incident traveling waves propagate in the +x direction with an amplitude A = 3.45 mm and a speed... | 0.352 m/s | Float | Physics | University |
448862 | John and Barbara Roberts are starting to save for their daughter's college education.
a. Assume that today's date is September 1, 2002.
b. College costs are currently $10,000 a year and are expected to increase at a rate equal to 6 percent per year for the foreseeable future. All college payments are due at the begin... | $3,618.94 | Float | Finance | University |
218121 | Find the radius and interval of convergence of the power series $\sum_{n=1}^{\infty} \frac{(-1)^n x^n}{n3^n}$. | radius = 3 and interval = [-3, 3] | List | Mathematics | University |
1702963 | The speaker compares the wall to___
A.) a dollhouse
B.) St. Patrick's Day
C.) his relative
D.) onions | D | Multiple Choice | Other | Junior High School |
1797262 | The density of lead is 11.4 g/cm{eq}^3
{/eq}. What is the thickness of a 6.60 g piece of lead measuring 11.5 mm by 9.00 mm on each side? Complete the solution in one line dimensional analysis. | 0.559 cm | Float | Physics | Senior High School |
426880 | A firm currently has a debt-equity ratio of 1/5. The debt, which is virtually riskless, pays an interest rate of 6.7%. The expected rate of return on the equity is 13%.
What would happen to the expected rate of return on equity if the firm reduced its debt-equity ratio to 1/6? Assume the firm pays no taxes. (Do not ro... | 12.83% | Percentage | Business | University |
568864 | Calculate {eq}\displaystyle \frac {dy}{dx} {/eq}. Simplify your answer. {eq}\displaystyle y = x^{6^{\sqrt x}} {/eq}. | {eq}\displaystyle \frac{dy}{dx} = \frac{3 x^{6\sqrt{x}} }{\sqrt{x}}\left ( 2+ \log x \right ){/eq} | Expression | Mathematics | University |
962263 | Is collagenous colitis an inflammatory bowel disease? | Yes | Boolean | Health | Senior High School |
703465 | What is the acceleration due to gravity on the top of Mount Everest? Mount Everest is the highest mountain peak in the world at the height of 8848 m. The value at sea level is 9.80 m/s.{eq}^2
{/eq} | 9.79 m/s^2 | Float | Physics | Senior High School |
1981249 | $I$ is an ideal in $\mathbb Z[x]$. Does $\mathbb Z[x] / I$ being an integral domain imply $\mathbb Z[x] / I$ is a field? When does $\mathbb F[x]/ I$ being an integral domain imply it's also a field? | No | Boolean | Mathematics | University |
983988 | The level of inventory of a manufactured product has increased by 8,000 units during a period. The following data are also available:
Variable
Fixed
Unit manufacturing costs of the period
$24.00
$10.00
Unit operating expenses of the period
8.00
3.00
... | $80,000 | Integer | Business | University |
405024 | What is the taxonomic classification for a crab? | Brachyura | String | Biology | Junior High School |
703170 | Your manager notes that you calculated the multifactor productivity for April as 4.81. She asks you what that means.
You reply:
a. "For every $4.81 in revenue, we cover all labor, overhead and material costs."
b. "For every $1 in revenue, we produce 4.81 units."
c. "For every $1 spent in operations, we produce 4.81... | c | Multiple Choice | Economics | University |
1572563 | Which of the following reasons could explain why an economy would be operating inside its production possibilities curve (PPC)?
a. Because a shrinking population has reduced the number of productive workers in the economy.
b. Because technological innovations have increased the productivity of labor and capital.
c. ... | d | Multiple Choice | Economics | Senior High School |
592202 | Describe the image of the region under the transformation: the quadrant $x>0, y>0$ under $w=\frac{z-i}{z+i}$. | lower half disk | Expression | Mathematics | University |
165515 | Define the Rossby number and write down the equation.
Equation of state with Coriolis terms;
{eq}\frac{D\vec{V}}{Dt}=-\frac{\bigtriangledown P}{\rho }-2 \Omega sin(\phi ).\vec{V}+g+v\bigtriangledown ^{2}\vec{V}
{/eq} | Ro = U/(fL) = U/(2Ωsin(φ)L) | Expression | Physics | University |
378682 | The following transactions were made by Waite Company. Assume all investments are short-term and are readily marketable.
June 2 Purchased 300 shares of Beaty Corporation common stock for $45 per share.
July 1 Purchased 200 Meng Corporation bonds for $220,000.
July 30 Received a cash dividend of $2 per share from Bea... | June 2: Trading Securities (Debit) $13,500, Cash (Credit) $13,500
July 1: Trading Securities (Debit) $220,000, Cash (Credit) $220,000
July 30: Dividend Income (Debit) $600, Cash (Credit) $600
Sept 15: Cash (Debit) $4,500, Trading Securities (Credit) $4,050, Realized Gain on Sale of Trading Securities (Credit) $450
Dec ... | List | Business | University |
1166177 | Seven mutually exclusive proposals are to be compared by using the benefits/cost criterion. Each project has an expected life of 50 years with negligible salvage value and is to be evaluated with a tax-free interest rate of 10 percent. Data for the projects, in dollars, are as follows:
A
B
C
... | G | String | Economics | University |
1285335 | Solve the differential equation {eq}y' + \frac {3y}{x + 7} = (x + 7)^6 with the initial condition {eq}y = 6 when {eq}x = 0 | y=\frac{1}{10}(x+7)^7-\frac{282454669}{10}(x+7)^{-3} | Expression | Mathematics | University |
1949188 | Does NASA say anything when astronauts breach the Karman line? | No | Boolean | Engineering | Primary School |
844709 | What are the spectator ion(s) in the following reaction?
Cu(OH){eq}_2
{/eq}(s) + 2H{eq}^+
{/eq}(aq) + 2Cl(aq) {eq}\to
{/eq} Cu{eq}^{2+}
{/eq}(aq) + 2Cl(aq) + 2H{eq}_2
{/eq}O(l) | 2Cl-(aq) | List | Chemistry | Senior High School |
109704 | In 1964, what issue did the Students for a Democratic Society (SDS) focus on?
the civil rights movement
education reform
labor organizing
the antiwar movement | D | Multiple Choice | History | Senior High School |
246888 | Which of the following is a debt management service offered by commercial banks?
A. Leasing
B. Factoring
C. Brokerage
D. Safe keeping | B | Multiple Choice | Finance | University |
1962156 | Fill in the blanks:
The _____ pulp of the spleen is also called splenic nodules. | white | String | Biology | Senior High School |
798320 | A {eq}-12\text{ nC}
{/eq} charge is located at {eq}(x, y) = (0.90\text{ cm}, 0\text{ cm})
{/eq}. What is the {eq}x
{/eq}-component of the electric field at the position {eq}(x, y) = (4.6\text{ cm}, 0\text{ cm})
{/eq}? | -7.9e+04 N/C | Float | Physics | Senior High School |
386793 | Two players, $A$ and $B$, alternately and independently flip a coin and the first player to obtain a $H$ wins. Assume player $A$ flips first. Suppose that $P(H)=p$. Show that for all $p$, $0<p<1$, $P(A \ \text{wins}) > 1/2$. | 1/(2-p) | Expression | Mathematics | University |
652387 | Is Python a functional programming language? | No | Boolean | Computer Science | Senior High School |
1807100 | When was the Einstein refrigerator invented? | 1926 | Integer | History | Junior High School |
613877 | A put option and a call option with an exercise price of $85 and three months to expiration sell for $6.18 and $5.09, respectively. If the risk-free rate is 4.8% per year, compounded continuously, what is the current stock price? | 82.90 | Float | Finance | University |
278045 | Suppose the government decided to tighten monetary policy and decrease government expenditures. In the short run in the Keynesian model, the effect of these policies would be to _____ the real interest rate and _____ the level of output.
a. lower; decrease
b. lower; have an ambiguous effect on
c. have an ambiguous e... | c | Multiple Choice | Economics | University |
436194 | When did electronic dance music begin? | late 1970's | String | History | Junior High School |
1276097 | What will the volume of a sample of gas be at STP if it has a volume of 2.34 L at 45°C and 0.984 atm? | 2.00 L | Float | Chemistry | Senior High School |
322778 | Clarence, age 67, and Jane, age 66, are Married Filing Jointly. What is the amount of gross income before they are required to file a federal return?
a) $21,950
b) $23,200
c) $20,700
d) $11,900 | b | Multiple Choice | Law | Senior High School |
536364 | A boat is pulled into a dock by a string attached to the bow of the boat and passing through a pulley on the dock that is {eq}1ft
{/eq} higher than the bow of the boat. If the string is pulled at a rate of {eq}3 ft/second
{/eq}, how fast is the boat approaching the dock when it is {eq}7 ft
{/eq} from the dock? | 3.03 ft/second | Float | Physics | Senior High School |
322914 | A point traveled half the distance with velocity {eq}v_0
{/eq}, the remaining part of the distance was covered with {eq}v_1
{/eq} for half the time and with velocity {eq}v_2
{/eq} for the other half. Find the mean velocity of the point averaged over the whole time of motion. | {\vec{v}_{ave.} = \dfrac{2v_o(v_1 + v_2)}{2v_o + v_1 + v_2} \hat{s}} | Expression | Physics | Senior High School |
1127759 | Solve the initial value problem $$u_t+3uu_x=0 ,\quad u(0,x)=\left\{\begin{matrix} 2 & x<1\\ 0& x>1 \end{matrix}\right.$$
My Idea: given that $u_t+3uu_x=0$ Now $\frac{dt}{1}=\frac{dx}{3u}=\frac{du}{0}$ $\frac{dt}{1}=\frac{du}{0} \rightarrow u=c_1$ $\frac{dt}{1}=\frac{dx}{u} \Rightarrow \frac{dt}{1}=\frac{dx}{3c_1} \Righ... | u=F(3ut-x) | Expression | Mathematics | University |
1276635 | If an AC generator with {eq}\displaystyle I(t) = 20 \sin (kx - \sqrt{10000(\pi t)^2})
{/eq} is connected to a series RLC circuit, where {eq}\displaystyle \rm R = 400 \ \Omega, \ L = 185 \ mH,
{/eq} and {eq}\displaystyle \rm Z = 25 \Omega
{/eq}.
Find the maximum voltage amplitude, {eq}\displaystyle \rm V_0
{/eq}. | 500 V | Integer | Physics | University |
1686961 | A cosmic ray electron moves at {eq}7.65\times {{10}^{6}}\text{ m/s} {/eq} perpendicular to the Earth's magnetic field at an altitude where field strength is {eq}1.15\times {{10}^{-5}}\text{ T} {/eq}. What is the radius (in m) of the circular path the electron follows? | 3.79 m | Float | Physics | Senior High School |
545804 | Write the equations for the stepwise dissociation
ofpyrophosphoric acid, H4P2)7. Identify all conjugate
acid-basepairs. | H₄P₂O₇ + H₂O ⇄ H₃P₂O₇⁻ + H₃O⁺
H₃P₂O₇⁻ + H₂O ⇄ H₂P₂O₇⁻² + H₃O⁺
H₂P₂O₇⁻² + H₂O ⇄ HP₂O₇⁻³ + H₃O⁺
HP₂O₇⁻³ + H₂O ⇄ P₂O₇⁻⁴ + H₃O⁺ | Expression | Chemistry | University |
803899 | How can I get rid of the $(2x+1)$ term in $|(2x+1)(x-2)|$ when trying to prove continuity of $f(x) = 2x^2 - 3x + 1$ at $c=2$ using the epsilon-delta definition? | For $x\in (1, 3)$, $|2x+1| < 7$, so for $\epsilon > 0$, we let $\delta = \min(1, \epsilon/7)$. Then, $|x-2| < \delta$ implies $|2x^2-3x-2| = |2x+1||x-2| < 7\delta \leq \epsilon$ | Expression | Mathematics | University |
1418627 | How is unemployment measured and reported? | Unemployment is measured by dividing the number of unemployed individuals by the total number of individuals in the labor force and multiplying the result by 100. It is reported as a percentage. | Percentage | Economics | Senior High School |
513382 | How many sets of quantum numbers specify all the #2p# orbitals? | 3 | Integer | Chemistry | Senior High School |
1498173 | On the Autobiography of an Ex-colored Man by James Weldon Johnson
Which is an appropriate theme of the passage?
A.
Being alone does not always mean the same as being lonely.
B.
Childhood friendships can form in unusual ways.
C.
The burden of intelligence is a necessary burden.
D.
Important information that i... | D | Multiple Choice | Other | Senior High School |
193257 | Ross and April Whittaker are married and have one child. Ross is putting together some figures so that he can prepare the Whittakers' joint 2014 tax return. He can claim three personal exemptions (including himself). So far, he's been able to determine the following with regard to income and possible deductions:
Tota... | 14305 | Integer | Economics | Senior High School |
1703982 | Which of the following statements is true regarding epithelium?
a) All epithelium is either eccrine, apocrine, or holocrine.
b) Secretory epithelium is classified as simple or stratified and also using the terms cuboidal, columnar, or squamous to describe the shape of the surface cells.
c) Epithelium covers all free... | c | Multiple Choice | Biology | University |
2044440 | Use cylindrical coordinates to describe the line through the point (1, 1, 0) and parallel to the z-axis. | (r, θ, z) = (√2, 45°, t) | Expression | Mathematics | University |
1798876 | Compared with when she was an adolescent, elderly Mrs. Packer is likely to experience a sad mood with Group of answer choices
1. decreasing frequency and less intensity.
2. less intensity and for a shorter period of time.
3. less intensity and for a longer period of time.
4. more intensity and for a longer period... | C | Multiple Choice | Psychology | University |
1539621 | There are 64 codons and 20 amino acids. Which of the following is not true?
A. Several different codons can specify the same amino acid.
B. The AUG codon, or methionine, is the start codon.
C. All amino acids are linked to a codon.
D. Each amino acid is specified by only one codon. | D | Multiple Choice | Biology | Senior High School |
1084066 | I have $\sum_{n=2}^\infty \frac{\log n}{n(n-1)}= O(1)$. Why is it bounded? | 1.25774688694437 | Float | Mathematics | University |
418650 | I have to solve this system of congruences: $$ \begin{cases} x^2+2x+2\equiv 0\pmod{10}\\ 7x\equiv 20\pmod{22} \end{cases} $$ after some calculations $$ \begin{cases} x\equiv 1\pmod{5}\\ x\equiv 2\pmod{5}\\ x\equiv 0\pmod{2}\\ x\equiv 6\pmod{2}\\ x\equiv 6\pmod{11}\\ \end{cases} $$ since $x\equiv 6\pmod{2}$ and $x\equiv... | x = {6, 72} mod 110 | List | Mathematics | University |
349606 | A company currently pays a dividend of $4 per share (D0 = $4). It is estimated that the company's dividend will grow at a rate of 19% per year for the next 2 years, then at a constant rate of 7% thereafter. The company's stock has a beta of 1.8, the risk-free rate is 3.5%, and the market risk premium is 6%. What is you... | 72.06 | Float | Finance | University |
687753 | How many silver atoms are there in 3.80 g of silver? | 2.12e+22 silver atoms | Float | Chemistry | Senior High School |
754528 | Find {eq}\int_{C}(xy+z^{3})ds along the arc C given by x=cost,y=sint,z=t for {eq}0 \leq t \leq \pi{/eq} | √(2)π^4/4 | Fraction | Mathematics | University |
699153 | Given $\vec{a}=[2,1,1]$ and $\vec{b}=[3,2,5]$. Write $\vec{a}$ in the form $\vec{a}=\vec{a_1}+\vec{a_2}$ where $\vec{a_1}$ is parallel to $\vec{b}$ and $\vec{a_2}$ is orthogonal to $\vec{b}$ | [39/38, 26/38, 65/38] + [37/38, 12/38,-27/38] | List | Mathematics | University |
682618 | Change the integral $\int_{\sqrt 2}^2 \int_{\sqrt{4-y^2}}^y dxdy$ into an equivalent polar integral and evaluate this polar integral. | 0.43 | Float | Mathematics | University |
951060 | XYZ manufactures footballs. The forecasted income statement for the year before any special orders included:
Sales are projected at $4,248,000 (total), $12.00 (per unit).
Manufacturing cost of goods sold is anticipated to be $3,255,000
Selling expenses are expected to be $315,000
Operating income is projected at $5... | $95,400 | Integer | Business | University |
301572 | How do you implicitly differentiate #11=(x-y)(e^y+e^x)#? | dy/dx=-(e^y+e^x+xe^x-ye^x)/(xe^y-e^y-e^x-ye^y) | Expression | Mathematics | University |
1502076 | Which amendment to the Constitution ended slavery in the U.S.? | 13th | Integer | History | Junior High School |
1363810 | Samar is having trouble coping with stressful life events, so he begins seeing a therapist. The therapist emphasizes the importance of the need for love and acceptance. Her approach is best described as _____. | humanistic | String | Psychology | Senior High School |
366916 | In a car engine, the cross-sectional area of a cylinder is 100.0 cm2. Inside the cylinder, high-pressure gaseous combustion products move a piston against an exter- nal pressure of 100.0 kPa. Calculate w for the process if the piston moves 10.0 cm. Recall w is defined as the work done on the gaseous system contained by... | -100 J | Integer | Physics | Senior High School |
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