Solve the problem.The total sales in dollars of some small businesses fluctuates according to the equation 
where x is the time in months, with x = 1 corresponding to January, 
and 
Determine the month with the greatest total sales and give the sales in that month.
A. March; $12,700
B. September; $4100
C. June; $8400
D. December; $12,700
Answer: A
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Compute the compound interest.How long must $5200 be in a bank at 8% compounded annually to become $8911.89? (Round to the nearest year.)
A. 7 yr B. 6 yr C. 8 yr D. 9 yr
Piecewise-defined functions occur in such applications as the cost of postage.
Answer the following statement true (T) or false (F)
Solve the problem.A size 4 dress in Country C is size 42 in Country D. A function that converts dress sizes in Country C to those in Country D is 
Find a formula for the inverse of this function.
A. f-1(x) = x - 38
B. f-1(x) = 
C. f-1(x) = x + 38
D. f-1(x) = 
Find the unknown length in the right triangle. If necessary, round to the nearest tenth.
A. 19 mi B. 14 mi C. 11 mi D. 20 mi