Solve the problem.Suppose that P(x) represents the percentage of income spent on automobile insurance in year x and I(x) represents income in year x. Determine a function A that represents total automobile insurance expenditures in year x.
A. A(x) = (P ? I)(x)
B. A(x) = (I - P)(x)
C. A(x) = (P + I)(x)
D. A(x) = 
(x)
Answer: A
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First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.James is taking a road to Calistoga. He has already driven 73.38 kilometers. If the entire distance to Calistoga is 115 kilometers, how much further must James drive?
A. Estimate: 30 kilometers; exact: 42.62 kilometers B. Estimate: 30 kilometers; exact: 41.72 kilometers C. Estimate: 40 kilometers; exact: 51.62 kilometers D. Estimate: 30 kilometers; exact: 41.62 kilometers
Calculate the mean of the set. Round to the nearest tenth, if necessary.35 ft 42 ft 24 ft 38 ft 21 ft 42 ft 22 ft
A. 32 ft B. 35 ft C. 28 ft D. 42 ft
Each day Larry needs at least 10 units of vitamin A, 12 units of vitamin B, and 20 units of vitamin C. Pill #1 contains 4 units of A and 3 of B. Pill #2 contains 1 unit of A, 2 of B, and 4 of C. Pill #3 contains 
of A, 1 of B, and 5 of C.Pill #1 costs 4 cents, pill #2 costs 5 cents, and pill #3 costs 1 cent. How many of each pill must Larry take to minimize his cost?
A. P1 = 2, P2 = 0, P3 = 6 B. P1 = 3, P2 = 0, P3 = 4 C. P1 = 1, P2 = 0, P3 = 9 D. P1 = 0, P2 = 0, P3 = 12
Express the sum using summation notation.
+ 
+ 
+ ... + 
A. 
B. 
C. 
D. 