Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 
A. not one-to-one
B. f-1(x) = 
C. f-1(x) = (x + 4)2
D. f-1(x) = x2 - 4, x ? 0
Answer: D
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Identify the polynomial as a monomial, binomial, trinomial, or none of these. Give its degree.-12c6 + 5c5 - 7c4
A. Binomial, degree 5 B. Binomial, degree 15 C. Trinomial, degree 15 D. Trinomial, degree 6
Evaluate the integral.
A. 10i + 6 ln 2j + (1 + 
)k
B. 10i + 6 ln 2j + (1 - 
)k
C. -6i + 6 ln 2j + (1 - 
)k
D. 10i + 6 ln 2j + 
k
Solve the problem.Suppose you would like to cross a 222-foot wide river in a boat. Assume that the boat can travel 33 mph relative to the water and that the current is flowing west at the rate of 5 mph. What bearing should be chosen so that the boat will land at a point exactly north from its starting point? Give your answer to the nearest tenth of a degree.
A. N 7° E B. N 8.7° E C. N 81.3° E D. N 5.8° E
Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.81 plus $0.16 per minute starting with the first minute. Find the total cost of a phone call which lasts 27 minutes.
A. $4.32 B. $27.13 C. $22.03 D. $5.13