Miss Know It All

The H.M.S. Dreadnaught is 10 miles north of Montauk and steaming due north at 15 miles/hour, while the U.S.S. Mona Lisa is 40 miles east of Montauk and steaming due east at an even 30 miles/hour. How fast is their distance apart increasing? (Give your answer to the nearest integer.)

The demand equation for rubies at Royal Ruby Retailers is given by the formula below, where q is the number of rubies RRR can sell per week at p dollars per ruby.

q+(4/3)p=70

RRR finds that the demand for its rubies is currently 15 rubies per week and is dropping at a rate of one ruby per week. How fast is the price changing? (Give your answer to the nearest cent.)

The number of portable CD players you are prepared to supply to a retail outlet every week is given by the formula below, where p is the price it offers you.

q=0.2p^2+9p

The retail outlet is currently offering you $100 per CD player. If the price it offers decreases at a rate of $1 per week, how will this affect the number you supply?

A rather flimsy spherical balloon is designed to pop at the instant its radius has reached 6 centimeters. Assuming the balloon is filled with helium at a rate of 10 cubic centimeters per second, calculate how fast the radius is growing at the instant it pops. (The volume of a sphere of radius r is V = (4/3) πr3. Give the answer to two decimal places.)

I need help solving for S.

I want a good digital camera with all the options my old Pentax has.

Suppose that X² follows a chi-square distribution with 11 degrees of freedom. Compute P(7≤ X²≤ 16) . Round your answer to at least three decimal places.

****The first person with the correct answer will get best answer -- non-serious responses will be reported as abuse.****

If I give an answer a thumbs up and then it is later voted as the best answer do they still get the point from the thumbs up?

Or is it best to wait to see who the best answer is before giving the thumbs up?

I want to make a cobbler but I want the crust to be more flaky than doughy.. what can i do?