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A right cylindrical tank, with its axis vertical, is full of water (density δ = 62.4 pounds per cubic foot). The tank is 10 feet high and has radius 5 feet. Sasha and Zhenya have to pump all the water out of the tank. Sasha pumped until 3 feet of water remained in the tank, and then Zhenya pumped the remaining 3 feet of water out. Who did more work?
A father and his son can clean the house together in 7 hours. When the son works alone, it takes him an hour longer to clean than it takes his dad alone. Find how long it takes the son to clean alone.
A nutrition laboratory tests 50 "reduced sodium" hot dogs, finding that the mean sodium content is 316 mg, with a standard deviation of 35 mg.
The simple interest formula I=prt gives the interest earned on an investment of p dollars at interest rate r for a time of t years. How much does Leroy need to invest at a rate of 7% in order to earn $420 interest in 4 years?
find the perimeter of the rectangle.the width of a rectangular playground is 2x - 5 feet and the length is 3x 9
A medical prosthetics company charges a $350 setup fee and $5.50 per piece to make a plastic brace for patients with sprained wrists. Write an equation to model this cost of production, and calculate the cost of producing 3000 braces?
Consider componentwise addition of element of Rn, and scalar multiplication defind. Conseder the sub space of P4(R) given by S = { f (x) member of P4 (R)| f (0)= f (1)=0} find a bais for S
Determine the population proportion
A man rows a boat 420 feet upstream against a constant current in 14 minutes. He then rows 350 feet downstream (with the same current) in 7 minutes. Find the speed of the current and the equivalent rate at which he can row in still water. Find spe..
a rectangular pen is built with one side against a barn. Two hundred meters of fencing are used for the other three sides of the pen. What dimesnsions maximize the area of the pen?
on average each bin fills at a rate of 58149 cubic centimeters of rubbish per hour. if lunch is 40 minutes. what is the
a company purchases its merchandise for 10 and sells for each item for 20. the pay-off table for the problem is given
if a plane can travel 470 mph with the wind and 390 mph against the wind, find the speed of the plane in still air.
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