If y varies directly as x, write a general formula to describe the variation.y = 7 when x = 
A. y = 
x
B. y = x + 
C. y = 
x
D. y = 56x
Answer: D
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Convert 80 ounces to pounds.
A. 20 B. 30 C. 5 D. 10 E. 60
Solve the problem.Find the center of mass of the hemisphere 
if the density is proportional to the distance from the center.
A. 
B. 
C. 
D. 
You are driving with your cruise control set when you encounter a slowly moving truck. You speed up to pass the truck. When you have overtaken the truck, you slow down and resume your previous speed. The graph of velocity, 
, is shown. Make a graph of 
, the acceleration. Be sure to label
your graph appropriately.
?
What will be an ideal response?
Solve the problem.Suppose you purchase a 30-year U.S. savings bond with an APR of 4.5%. The face value of the bond is $12,000. Find the purchase price of the bond.
A. $5454.55 B. $5155.75 C. $5106.38 D. $5057.96 E. $4800