12/29/13

What's f(1)?
If f"(x)-f'(x)-2f(x)=0, f'(0)=-2, and f(0)=2, what's f(1)?   Answer: 2e^-1    
Follows • 3
Expert Answers •2

12/25/13

Shortest route to take when delivering Christmas presents?
Huntsville is a small town with only six families. There is at least one child in each family which is on Santa's "nice" list.The Oskerville's house is five kilometers from the Huntsman's house.... more
Follows • 4
Expert Answers •3

12/24/13

What's f(x)?
If the graph of y=f(x) contains the point (0, 2), dy/dx=-x/(ye^x^2) and f(x)>0 for all x, what's f(x)?   I integrated and got c=2. But I have trouble for finding y. Please show all the... more
Follows • 2
Expert Answers •1

12/19/13

Find the number b such that the line y = b divides the region bounded by the curves y = 4x^2 and y = 9 into two regions with equal area.
(Round your answer to two decimal places.)
Follows • 4
Expert Answers •3

12/14/13

How do you use differentials to approximate possible error in computing the area of a square?
I know how to set up a problem with primary and secondary equations but I'm not sure how to start this problem:   "The measurement of the side of a square is found to be 12 inches, with a... more
Follows • 2
Expert Answers •1

12/12/13

which wave diffracts the most when encountering an obstacle?
 i need help really bad!!!!!!!!!!
Follows • 2
Expert Answers •1

12/12/13

Balance and include physical states
Calcium Sulfide in water is added to Cobalt(II) Nitrate in water to produce Calcium Nitrate in water and Cobalt(II) Sulfide in water.
Follows • 2
Expert Answers •1

12/09/13

how do you calculate lattice energy of an ionic compound
The question is "The lattice energies of FeCl3, FeCl2, and Fe2O3 are -2631,-5359, and -14,774 kJ/mol (in no particular order). Match the appropriate formula to the energy and explain. My question... more
Follows • 3
Expert Answers •2

12/09/13

Exponential Functions
Identify the variables, identify the constants, write the function, solve the equation and write a complete answer.   Suppose the acreage of forest is decreasing by 6.5% per year because of... more
Follows • 3
Expert Answers •2

12/09/13

"Assume that the population of a culture of bacteria is increasing exponentially.
 If the population is 200 at 14:00, and it becomes 3000 at 15:00, what is the population a t17:00?
Follows • 3
Expert Answers •3

12/04/13

Last statistics question of the semester for extra credit and I am done. Any help will be appreciated. Thank you
The number of hours worked per week by medical residents is normally distributed with a standard deviation of 4.8 hours. We want to test the claim that the mean number of hours worked per week by... more
Follows • 3
Expert Answers •2

12/04/13

Statistics hypothesis please so lost on this one
US citizens spend an average of 2.5 hours per day talking and/or texting on cell phones with a standard deviation of 0.7 hours. A sample of 35 teens aged 15-18 years showed an average of 2.9 hours... more
Follows • 2
Expert Answers •1

12/04/13

to Probability and Statistics
] The density function for a random variable X is given by f(x)={(_0 , otherwise^(kx, if0≤x≤2)) ¦ where k is a constant Find k. Find p(1/2<x<1) Find p(x<1) Find the mean and standard... more
Follows • 3
Expert Answers •2

12/03/13

Given 39 points, how many lines can be drawn that contain two of the 39 points?
im supposed to know how many lines 39 points make
Follows • 2
Expert Answers •2

12/03/13

If three cars of the same model are randomly selected, what is the probability that each of the three cars have efficiencies exceeding 32 mpg?
The mean of fuel efficiency is 30, with a standard deviation of 1.2 mpg. 
Follows • 3
Expert Answers •2

12/02/13

find the amplitude, period and the phase shift
find the amplitude, period and phase shift of  y=2sin ((2/3)x-pi/6)
Follows • 3
Expert Answers •2

11/29/13

How do you prove log(a^x) = 1/log(x^a)
My teacher will give me extra credit if I can prove that   log(a^x) = 1/log(x^a)   Can you help? Thank you.
Follows • 4
Expert Answers •3

11/29/13

maths statistics
A random sample of students at university was interviewed todetermine the amount of time that they spend on Facebook andto consider whether the average had changed from its previous level       The... more
Follows • 2
Expert Answers •1

11/29/13

economics with maths
An electrical component manufacturer has the following:   Price (£) received for each component sold:5 Fixed costs (£):20,000 Constant marginal cost (£):2       What is the break even level of... more
Follows • 2
Expert Answers •1

11/28/13

what is the difference between kramer's rule and chain rule
Can somebody out there help me with the above-mentioned question
Follows • 2
Expert Answers •1

11/27/13

Before calculators were around, why was it advantageous to use logarithms to calculate roots?
Before calculators were around, why was it advantageous to use logarithms to calculate roots?   Thanks, Bella
Follows • 4
Expert Answers •3

11/27/13

Find distance between parallel lines 3x+4 and 3x-6
Geometry question help please.
Follows • 3
Expert Answers •2

11/27/13

find the distance from point p at (3,-4) to line one that crosses points (-5,2) and (-2, 6)
Geometry question! Please help ASAp
Follows • 5
Expert Answers •4

11/25/13

Please help with a few problems I have before my final exam (:
4. Find the absolute maximum and minimum value of f(x)=S0x g(t)dt on the interval [0, 5], where g(t) is given by the graph below. (Remark: The part of the graph over [3, 5] is a quarter circle, and... more
Follows • 2
Expert Answers •1

11/25/13

Please help with a few problems I have before my final exam (:
3. Let f(x)=S0x g(t)dt, 0<=x<=6, where g(t) is given by the graph below. Note: I'm using "S" as the definite integral sign. (a) Find the values x at which f(x) has a local extremum. (b)... more
Follows • 2
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.