Saturday

April 25, 2015

April 25, 2015

Total # Posts: 80,582

**Math**

Would my answer be wrong if I used it on a test?
*March 29, 2015*

**Math**

The rainbow bridge of Utah is a natural arch that is approximately parabolic in shape. The arch is about 88m high. It is 84m across the base. Determine a quadratic relation, in standard form, that models the shape of the arch My answer was y=-22/441x^2+88 But the textbook said...
*March 29, 2015*

**exponential equations**

The Bruce’s purchased $2500 worth of GIC’s. How long, t, will it take for the investment to increase to $3500, if the interest rate is 2.75%.
*March 29, 2015*

**Pschology 202**

The psychological term for mental activities in which we think, solve problems, and use language is called?
*March 29, 2015*

**Calculus**

Integral of [1/(sqrt(8+2x-x^2))] dx
*March 29, 2015*

**Chem**

SO2F2(g) has a ΔHºf = -858 kJ mol-1 and the S-F bond is 308.0 kJ mol-1 Determine the average S=O bond energy in SO2F2 in units of kJ.
*March 29, 2015*

**Calculus**

Th integral of tan(3x)dx
*March 29, 2015*

**Geometry check **

Find the perimeter and are of a regular truangle with an apothem of 9 ft. Is the perimeter 54 ft & the area 243 ft?
*March 29, 2015*

**Geometry help**

Find the perimeter, apothem, and area of a regular triangle with a radius of 6sqrt3. How do I do this?
*March 29, 2015*

**Pschology 202**

lk
*March 29, 2015*

**Calculus**

If I were to find the derivative, would I derive ln y=(1-x)(lnx)? How would you derive this problem?
*March 29, 2015*

**Calculus**

How would you use logs?
*March 29, 2015*

**Calculus**

I did try and got it wrong and I'm unsure on how to go about the problem.
*March 29, 2015*

**Calculus**

Simplify using basic simplification. y=x^(1-x)
*March 29, 2015*

**Calculus**

Simplify using basic simplification. f(x)=ln[(sqrt(x^2+1))/(x(2x^3-1)^2)]
*March 29, 2015*

**Pschology 202**

After school, Raven enjoys going to the park to hang out with her friends and watch them do tricks on their skateboards. Every day, her friends encourage her to get a skateboard so that she can learn how to skate and do what they do. Eventually, Raven gives in and buys a ...
*March 29, 2015*

**Calculus**

Find the equation of the tangent line when x=2 for the functin f(x)=5^(x/2)
*March 29, 2015*

**statistics**

A simple random sample of a size n is drawn from a population that is normally distributed. The sample mean, x is found to be 110, and the sample standard deviation, s, is found to be 10. A- Construct a 95% confidence interval about u if the sample size, n, is 17
*March 29, 2015*

**math**

b= 18 inches Thanks for the help
*March 29, 2015*

**math**

The area of a triangle is 135 square inches. If the height is 15 inches, what is the length of the base?
*March 29, 2015*

**Chemistry**

10^3
*March 29, 2015*

**Math**

Jenna will use 1/3 of a piece of wood to make 4 shelves of equal size.
*March 29, 2015*

**math**

Stacy and Steve each have brownies of equal size,as shown. Stacy cuts her brownie into halves.Steve cuts his brownie into eighths. Which statement is true? A.Stacy has more pieces than Steve. B.Stacy has 4 pieces. C.Steve has smaller pieces than Stacy. D.Steve has fewer pieces...
*March 29, 2015*

**Shegal**

yes, it is coulomb's law. I assume the charges are left to right, 1,2,3 well the force on 2 from one is to the right(it repulses). the force on 2 from 3 is attractive, so it is to the right. So, the easy way is to figure the magnitude of each force, then ADD them, and the ...
*March 29, 2015*

**math**

Lexie divided these hexagons into 2 parts and shaded one part. Which shaded parts cover half the hexagon? A.only the shaded trapezoid B.both the shaded triangle and the shaded Pentagon C.only the shaded Pentagon D.both the shaded trapezoid and the shaded Pentagon And could you...
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
*March 29, 2015*

**chemistry**

What is the delta Hvap of a liquid that has a vapor pressure of 612 torr at 77.6 degrees C and a boiling point of 94.9 degrees C at 1 atm?
*March 29, 2015*

**math**

Problem: A riding stable manager is planning a nutritional diet for 9 horses. The manager finds the table below in a guide about horse health. The cost of 1000 Calories of horse feed is $0.25. What is the cost per day to feed 9 horses? (Hint: First, try writing an expression ...
*March 29, 2015*

**physics**

well, the upward component is 15 m/s, so the height is h(t) = 15t - 4.9t^2 So, just find the vertex of that parabola.
*March 29, 2015*

**Project management**

Build a PowerPoint® presentation that will address each of the Project Management Areas of Knowledge, the process groups that use these areas of knowledge, and how the process groups interact with the knowledge area processes. Use table 3-1, Project Management Process ...
*March 29, 2015*

**ALGEBRA**

Describe how you know if an inequality is an “and” or an “or” problem. (use -3 < x+5 < 8). Also, how do you know if an absolute value question is an “and” or an “or” problem? Lastly, will you always have two solutions to an ...
*March 29, 2015*

**statistics**

a repair shop believes that people travel more than 3500 miles between oil changes a random sample of 8 cars getting an oil change has average distance of 3375 standard deviation of 225 miles with alpha 0.05 is there enough evidence to support the shops claim
*March 29, 2015*

**math**

for f(x)=x^2+3 and g(x)=ãx find (f/g) (x) the domain (f/g)
*March 28, 2015*

**math**

50 feet of fencing is used to create a rectangular fenced-in region. if the length of the region is x, express the width, w, as a function of x
*March 28, 2015*

**History :)**

New England was a good starting place for American textile manufacturing for what reason? A)There were no ports within easy access. B)It was the birthplace of Frances Cabot Lowell. C)Rocky soil made the area inadequate for farming. *** D)Most manufacturing products were being ...
*March 28, 2015*

**Chemistry**

Thank you!!
*March 28, 2015*

**rela 10H**

requirenment for essay: Attention-grabber: Relevant quotation Create imagery to evoke imagination Fragment & general discussion Hypothetical question Who/what/when/where/why/how the mystery began (why is it mysterious?) Ask the question from the list of choices Briefly (one or...
*March 28, 2015*

**statistics**

If I selected one player at random what would be the probability of an NBA player in the Eastern conference being less than 6 feet tall? First calculate the z-score and then use the standard normal table to find the probability.
*March 28, 2015*

**Language art **

In the multi-draft reading process, what does a reader look for in the second reading of a drama A. The theme of the drama B. How each scene moves a story forward C. When and where the action takes place D. The internal and external conflict
*March 28, 2015*

**statistic**

A statistics quiz consists of 10 multiple questions. There are four choices for each question. One student is unprepared and decides to guess the answers to every question. Assuming 70% is a passing grade, find the probability that the student will pass the quiz.
*March 28, 2015*

**Math**

Find the exact value of the sine, cosine, and tangent of the angle 330 degrees. I know the tangent is -(square root 3)/3, but how?
*March 28, 2015*

**chemistry**

14-9.65=4.35 POH log (0.27/.7675)= -.454 + 4.35= 3.89 10^ (-3.89)= 1.28 E-4 M
*March 27, 2015*

**chemistry**

i did not get the answer
*March 27, 2015*

**biochemistry **

if you dissolve 9 mg of glucose in 5 ml of water .what is the concentration of glucose in %w\v the resulting solution?
*March 27, 2015*

**Chemistry**

C2H5OH(l) + 3 O2(g) -> 2 CO2(g) + 3 H2O(g) During an experiment 10.00 g of ethanol is completely burned in air to release CO2(g) and H2O(g) as shown in the equation above. During the combustion, 296.6 kJ of heat energy is released. What is the molar enthalpy of combustion...
*March 27, 2015*

**Language Arts**

Is it D
*March 27, 2015*

**Language Arts**

Whose attitude toward Scrooge is the most severe? A.Marley's B.Bob Cratchits C.The ghost of Christmas Presents D.Mrs. Cratchit's ***
*March 27, 2015*

**Engineering Economics**

A granary has two options for a conveyor used in the manufacture of grain for transporting, filling, or emptying. One conveyor can be purchased and installed for $70,000 with $3,000 salvage value after 16 years. The other can be purchased and installed for $110,000 with $4,000...
*March 27, 2015*

**Math Help!!!**

geometric... just common sense
*March 27, 2015*

**science**

A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. How long was the ball in the air? Round the answer to the nearest tenth of a second.
*March 27, 2015*

**statistics**

Consider the test of hypothesis for the equality of two population means. The sample data from the first population is: n = 10, x-bar = 52.4, s = 5. The sample data from the second population is: n = 8, x-bar = 48.2, s = 6. Both variables are normally distributed and the ...
*March 27, 2015*

**statistics**

A test of hypothesis is performed to determine whether the proportion of Montrealers (population 1) who want the decriminalization of marijuana is greater than the proportion of Torontonians (population 2) who want decriminalization of marijuana. A random sample of 115 ...
*March 27, 2015*

**statistics **

A random sample of 150 investment bankers (population 1) had thirty percent who expressed dissatisfaction with their choice of career. A random sample of 200 financial analysts (population 2) had forty-two percent who expressed dissatisfaction. In testing the hypothesis that a...
*March 27, 2015*

**statistics**

The Vancouver Chamber of Commerce claims that the mean cost of hotels in the downtown area of the city is less than in Edmonton. A random sample of 50 hotels in Vancouver (population 1) had a mean nightly rate of $109 with a standard deviation of $15. An independent sample of ...
*March 27, 2015*

**statistics **

Which of the following statements are true? (A) In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha...
*March 27, 2015*

**statistics **

A comparison of the last year's (Population 1) versus the current year's (Population 2) shipments (in thousands of dollars) for each of six Canadian exporters is given as follows: (4.34, 4.77), (5.89, 5.16), (2.52, 2.73), (3.91, 4.39), (4.99, 5.25), (3.24, 3.80). It is...
*March 27, 2015*

**statistics **

A VP of manufacturing claims that no more than 3% of items produced using a certain assembly line are defective. A random sample of 100 items from the assembly line had 5 defectives. At the 5% level of significance, which of the following would be part of the standardized ...
*March 27, 2015*

**statistics **

The Dean of a university claims that no more than 10% of the students drop out of university. She chooses a random sample of 500 students and decides that she will accept the claim only if no more than 25 of the 500 students drop out of university. In fact her claim is true - ...
*March 27, 2015*

**statistics **

Which of the following statements are false? (A) The t-distribution should always be used when n is small. (B) A test of hypothesis is found to have a p-value of .0682. Then one should conclude H1 if the level of significance is 10% and conclude Ho if the level of significance...
*March 27, 2015*

**statistics **

A study is to be conducted to determine whether the mean cost of repairing a car is more than $500. A random sample of 100 repairs is selected and the following decision rule is constructed: conclude the null hypothesis if the sample mean is less than or equal to $515, ...
*March 27, 2015*

**statistics**

A sample of 50 items is selected to determine whether or not to accept the hypothesis that a population means differs from a value of 20. The sample mean and standard deviation are 18 and 7, respectively. The null hypothesis is not rejected, which of the following is a ...
*March 27, 2015*

**math/stats**

A sample of 50 items is selected to determine whether or not to accept the hypothesis that a population means differs from a value of 20. The sample mean and standard deviation are 18 and 7, respectively. The null hypothesis is not rejected, which of the following is a ...
*March 27, 2015*

**math/stats**

Understood.
*March 27, 2015*

**math/stats**

Which of the following statements are true? (A) In a two-tail test of hypothesis for a population mean the decision rule is to reject H0 if the test statistic lies outside of the action limits. (B) A statistical test of hypothesis is performed under the assumption that the ...
*March 27, 2015*

**English vocab **

if you BLANK someone's mail, then you seize it before the person receives it; however, it is illegal to take someone's mail, so the police might attempt to BLANK you and put you in jail. What are the two blanks?
*March 27, 2015*

**Math**

A wheel turns 9times per minute its diameter is1.2 at what speed must I run to stay on top
*March 26, 2015*

**Math**

If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top
*March 26, 2015*

**us history**

"The military, which had protected African American rights, was removed from the South." <- That one.
*March 26, 2015*

**phy**

Tin melts at 232 under standard atmospheric pressure. Express this temperature in kelvin
*March 26, 2015*

**statistics**

a local content center reports that it has been experiencing a 15% rate of no shows on advanced reservation Among 150 advanced reservations find the probability that there will be fewer than 20 no shows round the standard deviation to three decimal to work the problem
*March 26, 2015*

**statistics**

a local content center reports that it has been experiencing a 15% rate of no shows on advanced reservations. Among 150 advanced reservations find the probability that there will be fewer than 20 no shows round the standard deviation to three decimal to work the problem
*March 26, 2015*

**Physics**

Nvm, found it. 765 is probably suppose to be kg, but doesn't apply anyways, since the equation is 3500 = 262*d*cos(0). Dumb question tries to trick you.
*March 26, 2015*

**Physics**

It took a force of 262. N to pull a crate weighing 765 N across the floor. The work done was 3500. J. How far was the crate moved?
*March 26, 2015*

**Physics**

An 78.9 kg person carries a 23 N package up a flight of stairs. The vertical height of the stairs is 23.8 m. How much work is done?
*March 26, 2015*

**government **

what is the connection with mcculloch v maryland and proper clause
*March 26, 2015*

**math**

What is the least common denominator for the fractions and ? A. 14 B. 18 C. 24 D. 48
*March 26, 2015*

**Calc**

A model for the food-price index (the price of a representative "basket" of foods) between 1984 and 1994 is given by the function I(t)=0.00009045t5+0.001438t4−0.06561t3+0.4598t2−.6270t+99.33 Where t is measured in years since midyear 1984, so 0≤t&#...
*March 26, 2015*

**ELAAAAAAAAAA**

Pretty sure it's either C or D. Most likely D.
*March 26, 2015*

**chemistry**

A mixture og gases has a total pressure off 28.3 atm, it is made of: 5.8 atm of hydrogen gas, 7.2 atm of nitrogen gas, 3.5 atm of oxygen gas and some amount of methane. What is the pressure of methane? what is the pressure of methane in kPa?
*March 26, 2015*

**astronomy**

The distance from Earth of the red supergiant Betelgeuse is approximately 643 light-years. If it were to explode as a supernova, it would be one of the brightest stars in the sky. Right now, the brightest star other than the Sun is Sirius, with a luminosity of 26LSun and a ...
*March 26, 2015*

**Math**

Samantha has 2 meters of ribbon for wrapping packages She uses 15 centimeters of ribbon on first package how much ribbon is left
*March 26, 2015*

**math**

3 times 72
*March 25, 2015*

**physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 5.28 m. The stones are thrown with the same speed of 9.33 m/s. Find the location (above the base of the ...
*March 25, 2015*

**math**

A number cube with the numbers 1 through 6 is rolled. find the given probability P(number < 2) (1 point) 1/6 2/6 *** 4/6 3/6 2. P(number ≥ 3) (1 point) 4/6 1/6 2/6 5/6 I think it's A .. I'm not quiet sure. please help 3. P(complement of 4) (1 point) 1/6 5/6 2/...
*March 25, 2015*

**chemistry**

An equilibrium mixture of N2, H2, and NH3 at 700 K contains 0.031 M N2 and 0.52 M H2. At this temperature, Kc for the reaction is 0.29. What is the concentration of NH3? N2(g) + 3H2(g) (equilibrium arrow) 2NH3(g)
*March 25, 2015*

**aljebra**

A private plane leaves an airport and flies due east at 192 miles per hour. Two hours later, a jet leaves the same airport and flies due east at 960 miles per hour. How long will the private plane fly until it is passed by the jet?
*March 25, 2015*

**French**

I would like to double check my progress so far on my assignment to make sure I'm on the right track. 1. Complétez les phrases suivantes: A. Nous doutons que vous... Answer: Nous doutons que vous dites la vérité. B. Je suis heureuse que nous... Answer...
*March 25, 2015*

**algebra**

reduce rational expression x-5/x-9
*March 25, 2015*

**math**

Hmmm. set R=C and solve for x. Is there something you dont understand about that?
*March 25, 2015*

**eNGlish**

its a
*March 25, 2015*

**math**

suppose that x liters of 36% acid solution are mixed with y liters of a 50% solution to obtain 100 L of a 37% solution. One equation is a system for solving this problem is x+y=100. which of the following is the other solution?
*March 25, 2015*

**Math**

Suck a dick
*March 25, 2015*

**Math**

Sorry that was my brother
*March 25, 2015*

**Math**

Suck a dick
*March 25, 2015*

**Physics**

In the figure below, a block of mass m = 14 kg is released from rest on a frictionless incline angled of angle θ = 30°. Below the block is a spring that can be compressed 2.0 cm by a force of 270 N. The block momentarily stops when it compresses the spring by 4.6 cm. ...
*March 25, 2015*

**Calc**

A manufacture has been selling 1300 television sets a week at $420 each. A market survey indicates that for each $16 rebate offered to a buyer, the number of sets sold will increase by 160 per week. If the weekly cost function is 91000+140x, what value of the rebate maximizes ...
*March 25, 2015*

**Accounting**

3) Green Corporation is a calendar-year taxpayer. All of the stock is owned by Evan. His basis for the stock is $35,000. On March 1 (of a nonleap year), Green Corporation distributes $120,000 to Evan. Determine the tax consequences of the cash distribution to Evan in each of ...
*March 25, 2015*

**math**

Thanks~!
*March 25, 2015*

**math**

A survey about the student government program at a school finds the following results. 190 students like the program 135 students think the program is unnecessary 220 students plan on running for student government next year. If a circle graph were made from the data, what is ...
*March 25, 2015*

**Chemistry**

It depends on the reaction
*March 25, 2015*