Use a reference angle to find the value. sin (-120°)
A. - 
B. 
C. 
D. 
Answer: A
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Find the slope of the polar curve at the indicated point.r = 4 sin 4?, ? = 
A. 
B. undefined
C. 1 + 
D. -1
Solve the problem.There are currently 67 million cars in a certain country, increasing exponentially by 4% annually. How many years will it take for this country to have 83 million cars? Round to the nearest year.
A. 5 yr B. 69 yr C. 3 yr D. 4 yr
Add the numbers using the number line.-92 + 93 
A. 185 B. 1 C. -185 D. -1
Restrict the domain of the function f so that the function is one-to-one and has an inverse function. Then find the inverse function f-1. State the domains and ranges of f and f-1. ? f(x) = |x - 9| + 1 ?
A. f-1(x) =x+ 8The domain of f and the range of f-1 are all real numbers x such that x ? 9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. B. f-1(x) = x - 8The domain of f and the range of f-1 are all real numbers x such that x ? 9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. C. f-1(x) = -x - 8The domain of f and the range of f-1 are all real numbers x such that x ? 1.The domain of f-1 and the range of f are all real numbers x such that x ? -9. D. f-1(x) = x + 8The domain of f and the range of f-1 are all real numbers x such that x ? -9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. E. f-1(x) = -x + 8The domain of f and the range of f-1 are all real numbers x such that x ? 1.The domain of f-1 and the range of f are all real numbers x such that x ? 9.