Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 7x2 + 6, x ? 0
A. f-1(x) = 
B. f-1(x) = 
C. not one-to-one
D. f-1(x) = 
Answer: B
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Complete the identity.cos 
= ?
A. sin x B. cos x C. -cos x D. -sin x
Solve the problem.The number of visitors to a tourist attraction (for the first few years after its opening) can be approximated by 
where x represents the number of months after the opening of the attraction. Find the number of visitors 32 months after the opening of the attraction.
A. 370 visitors B. 100 visitors C. 55 visitors D. 82 visitors
Solve the problem.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 5 ft from a light is 2 foot-candles, find the intensity on a screen 15 ft from the light.
A. 2 foot-candles
B. 
foot-candle
C. 1
foot-candles
D. 
foot-candle
Indicate whether the inequality is true or false.12.9 ? -13
A. True B. False