Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = 
, 
< ? < 2?Find sin(2?).
A. 
B. - 
C. 
D. - 
Answer: D
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Use the strategy of grouping to 10 to find the sum of the numbers.4, 7, 8, 6, 5, 5, 3
A. 30 B. 20 C. 28 D. 38
Solve.An economist predicts that the buying power B(x) of a dollar x years from now will be given by the formula B(x) = 0.22x. How much will today's dollar be worth in 7 years? Round the answer to the nearest cent.
A. $0.35 B. $1.53 C. $1.54 D. $0.00
The function f is one-to-one. State the domain and the range of f and f-1. Write the domain and range in set-builder notation.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D is all real numbers, R = 
B. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
C. f(x): D = 
, R is all real numbers;
f-1(x): D is all real numbers, R = 
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Solve.At Allied Electronics, production has begun on the X-15 Computer Chip. The total revenue function is given by 
and the total cost function is given by 
where x represents the number of boxes of computer chips produced. The total profit function, P(x), is such that 
Find P(x).
A. P(x) = -0.3x2 + 40x - 15 B. P(x) = 0.3x2 + 40x - 30 C. P(x) = -0.3x2 + 31x + 15 D. P(x) = 0.3x2 + 31x - 45