04/20/15

Find a value of c satisfying Rolle’s Theorem for f(x) = x^3 -2x^2 -2x +4 on [0,2]. round your result to 3 decimal places.
It is continuous on [0,2] and differentiable on (0,2) f'(x)=3x^2-4x-2 The thing that I am stuck on is that f(a) does not equal f(b) f(0)=4 f(2)=0   I went ahead and plugged in the zero... more
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04/20/15

Find the increase in the water's entropy.
Suppose that by stirring 495 g of water you are able to increase its temperature from 19.0° C to 21.0° C. Find the increase in the water's entropy. answer in J/K
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04/19/15

See Description
  ∫ ex³•x2dx=
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04/19/15

solve f'(x)=4x-3 when the curve passes (2,3)
solve f'(x)=4x-3 when the curve passes (2,3)
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04/15/15

A rectangle has area 2yd squared and perimeter 6 yd, find dimensions
need answers in pointsand dimensions as well as using the quadratic formula to solve this system 
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04/15/15

Need help finding the efficiency of a heat engine.
If a heat engine takes in 957 watts of heat from a source at a temperature 1,000 kelvin and dumps off 126 watts of heat to a heat sink at 300 kelvins. What is the efficiency of the heat engine?
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04/13/15

A volume of nitrogen gas has a density of 1.15 kg/m3 and a pressure of 1.01 atm.
A volume of nitrogen gas has a density of 1.15 kg/m3 and a pressure of 1.01 atm. Find the temperature of the gas and the rms speed of its molecules
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04/08/15

Evaluate system of equations , all are one under a bracket
use Cramer's rule to solve this system if equations. Use cofactors to evaluate the determinants. {-2x+y-z=7                        2y+3z=1                        X-3y=-8}
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04/06/15

Calculate the pressure on a man's feet if his weight is
(a) Calculate the pressure on a man's feet if his weight is 1107 N and the soles of his feet have a total surface area of 355 cm2.  (b) Find the pressure on his feet when his body is 65% submerged... more
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04/02/15

Find point of f(x)
Find point on f(x)=x^2 that is closest to point (4,0).
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03/29/15

Find the absolute extrema on [-2,2]
f(x)= 10–12x+6x2–x3      
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03/24/15

wavelength of light
When Michelson interferometer was used to measure the wavelength of monochromatic light, it was found that 400 fringes passed the observing microscope when the movable mirror was displaced 0.088... more
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03/07/15

How many ways can you pick the cars so not all are the same size?
For this problem, assume that you are to pick 4 cars from the motor pool, which contains 7 subcompact cars, 6 compact cars, and 4 midsize cars. How many ways can you pick the cars so not all are... more
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02/11/15

radius of curvature of mirror
A magnifying mirror produces an erect virtual image 2.5 times as high as the object 24 cm from it. Find the radius of curvature of the mirror.
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02/08/15

Find the radius of curvature of the mirror
 A magnifying mirror produces an erect virtual image 2.5 times as high as the object 24 cm from it. Find the radius of curvature of the mirror.
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02/04/15

Stats word problem
3. The probability that a person picked at random is over 65 years old is 0.12. If two people are picked at random, find the probability that: a. they are both over 65b. neither is over 65c. at... more
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01/26/15

Compound Interest #6-7
$4800 is invested at 3.2% APR compounded semiannually. Use the compound interest formula to compute the balance in the account after 14 years. Balance =____$ (Round to the nearest cent.)  $4800 is... more
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11/17/14

Solve the rational inequality
x-1/x+5 <0       Solve rational inequalities 
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11/09/14

what is the number?
translate the problem into a system of 3 equations using 3 variables. solve the system. the sum of the digits of a three-digit number is 12. the tens digit is 2 less than the hundreds digit, and... more
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11/09/14

find the indefinite integral
16x(8x^2 + 9)^4 dx
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10/28/14

A car is twice as old as its radio was when the car was as old as the radio is. The sum of their ages is 49 years. How old is the car and how old is the radio?
physics extra credit- please explain how to do the work
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10/28/14

Flight times between London and Hong Kong are normally distributed with
Flight times between London and Hong Kong are normally distributed with = 12:5 hours and standard deviation = 1:5 hours. (a) (10) Find the probability that a áight will take longer than 14 hours.... more
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10/28/14

A fair die is rolled 30 times. what is the expected number of sixes to turn up in 30 rolls? What is the probability of getting at least 7 sixes in 30 rolls?
This is a question that is on binomial distribution. I have the formula and I also know how to enter it into my ti83 but the answer comes up differently every time. 
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10/21/14

Find the derivative of the logrithmic function
g(x) = ln(2x + 9)
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10/19/14

Compond Interest
Find the present value of $126,488.02 due in 9 years at an interest rate of 11%/year compounded continuously. 
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