12/07/15

When a cold drink is taken from a refrigerator, its temperature is 5ºC. After 25 minutes in a 20ºC room its temperature has increased to 10 ºC.
When a cold drink is taken from a refrigerator, its temperature is 5ºC. After 25 minutes in a 20ºC room its temperature has increased to 10 ºC. (a) What is the temperature of the drink after 50... more
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12/06/15

Find the derivative : y = log2 (x^2 / (x - 1)
Find the derivative :    y = log2 (x2 / (x - 1)     ANSWER:  1 / ln(2)   *   (2/x  -  1/(x - 1)) #36, practice exam
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12/06/15

Find the exact length of the polar curve. r = e^9x, 0 = x = 2pi
Find the exact length of the polar curve. r = e^(9θ), 0 ≤ θ ≤ 2π
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12/03/15

Series converges or diverges
∞∑  ((3n-2)/(5n+1))^nn=1
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12/03/15

Determine if the sequence converges or diverges
an=(1+(1/n3))^n
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12/02/15

Markov Chains
If the student attends class on a certain Friday, then he is three times as likely to be absent the next Friday as to attend. If the student is absent on a certain Friday, then he is five times as... more
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11/17/15

A weight loss program advertises "LOST 40 POUNDS IN 4 MONTHS".
A random sample of n = 25 customers has x ¯= 31 pounds lost and s = 12. To contradict this claim test H0: μ = 40 versus H1: μ < 40 at α = 0.05.     Find the associated p-value. Round to four... more
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11/10/15

Estimate the area under the graph
Suppose you estimate the area under the graph of f(x)=1x from x=11 to x=111 by adding the areas of rectangles as follows: partition the interval into 50 equal subintervals and use the left endpoint... more
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11/08/15

Find the Maclaurin series for f(x)= 1/(1+x^2)^2
I could really use some help please!
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11/08/15

Find the Maclaurin series for f(x)= x^2/sqrt(x^5+1)
I really have no idea how to go about this, could really use some help, thank you!
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11/04/15

4x + 2y = 12 and y = x - 3. Write the solution to this system of linear equations by typing the intersection point from your TI-83 Plus.
Use your TI-83 Plus to find the solution for this system of equations: 4x + 2y = 12 and y = x - 3. Write the solution to this system of linear equations by typing the intersection point from your... more
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10/27/15

Price Elasticity of demand
If P=80-.4Q what is the price elasticity of demand?
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10/22/15

Calculate the change in internal energy of the following system: A 100.0-g bar of gold is heated from 25°C to 50°C during which it absorbs 322 J of heat. Assume
Calculate the change in internal energy of the following system: A 100.0-g bar of gold is heated from 25°C to 50°C during which it absorbs 322 J of heat. Assume the volume of the gold bar remains... more
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10/05/15

Need help not good in this course
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 171 lb. The new population of pilots has normally distributed weights... more
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09/29/15

Find f'(x) and f"(x): f(x)=x/x^2-1
Please help me 
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09/03/15

uncertainty in position of electron
The mass of an electron is 9.11x10^-31 kg  What is the incertainty in the position of an electron moving at 4.00x10^6 m/s with an uncertainty of change in v = 0.01x10^6 m/s?
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08/31/15

find the derivative of each of the following
1) f(x)=6x-11/8x+1   2) f(x)=(5x-2)(2x+3)/x-4   3) f(x))=√¯8-5x    
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08/27/15

Simplify (x+cos x)(cos x)-(1+sin x)(1-sin x)/(x+cos x)^2
Please help me
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08/25/15

A 10 foot ladder is leaning against a house and makes an angle of 67 degree's with level ground. How far is the top of the ladder above the ground.
(round to 10th of a foot)
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08/25/15

Simplify (x+cos x)(cos x)-(1+sin x)(1-sin x)/(x+cos x)^2
I need help please
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08/25/15

Calculus Question
Which is the moment of inertia of the following system about the y-axis of the system   m1 = 6 at (2, 1)   m2 = 9 (-3, 6)   m3 = 11 (2, 9)
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07/13/15

2xy'' + (1-2x^2)y' - 4xy = 0
Solve by series of expansion: Put in closed form: 2xy'' + (1-2x^2)y' - 4xy = 0
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07/06/15

Thermodynamic Process
A 3.1-mole sample of an ideal gas is gently heated at constant temperature 290 K. The gas expands to 1.5 times its initial volume as its pressure decreases. What is the change in the internal... more
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07/05/15

Physics: Entropy Change
If a 0.06247 kg ice cube initially at 0.00 C is allowed to melt in a Styrofoam cup holding 0.497 kg of water at 10.0 C , what is the total entropy change for this process?
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07/05/15

Physics: Kinetic Theory
Kinetic theory a. What is the average kinetic energy of a monatomic gas at a temperature of 354 K? b. If this is Ne gas (neon has 20 nucleons) what is the root-mean-squared speed? c. What... more
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