Problem 1:

A man can row his canoe at a constant rate of 5 miles per hour in still water. He rows upstream for 15 minutes and then rows downstream, returning to his starting point in another 12 minutes. What is the current in miles per hour?

Problem 2:

a). A piggy bank of Nicole contains 40 coins in nickels, dimes and quarters. If there are 6$ in the bank and twice as many dimes as nickels, how many quarters are in the piggy bank?

b). The sume of two numbers is 35 and their product is 15. Find the sume of their reciprocals.

Problem 3:

A rectangular garden is to be twice as long as it is wide and is to be included by a fence. The area, A, of the garden will be a function of the amount of fence used. Which of the following is the correct function for this condition?

A. A = P²/36

B. A = P²/18

C. A = P²/12

D. A = P²/6

Problem 4:

What is the coefficient of the starting, friction if the force require move a mass of 100 kg over a rough surface is around 460 N?

A. 0.35
B. 0.47
C. 0.52
D. 0.59