Find a formula for the inverse of the function described below.A size 10 dress in Country C is size 40 in Country D. A function that converts dress sizes in Country C to those in Country D is 
A. f-1(x) = 
B. f-1(x) = 
C. f-1(x) = x + 30
D. f-1(x) = x - 30
Answer: D
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Find the center of mass of a thin plate of constant density covering the given region.The region between the x-axis and the curve y = 3csc2 x, 
? x ? 
A. 
= 
, 
= 3
B. 
= 
, 
= 2
C. 
= 
, 
= 4
D. 
= 
, 
= 
Solve the problem.The following graph shows the educational attainment of residents of a certain town (in black) compared to the state average (in gray). 
What is the least common education level in the town?
A. Bachelor's degree B. Professional degree C. Master's degree D. Some college, no degree
Solve the problem.The future value of a simple interest investment is given by S = P(1 + rt), where P is the principal invested at a simple interest rate r for t years. What principal P must be invested for 
at the simple interest rate 
so that the future value grows to $3600.
A. $3503.65 B. $3472.67 C. $127.33 D. $3243.24
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2