Simplify.
A. 13
B. 84
C. 14
D. Not a real number
Answer: A
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Find the derivative of the function by first expanding or simplifying the expression. f(x) = (3x + 4)2
A. f'(x) = 9x + 16 B. f'(x) = 9x + 12 C. f'(x) = 18x + 24 D. f'(x) = 6x + 8
Write the equation in its equivalent exponential form.log5 x = 2
A. 5x = 2 B. 25 = x C. 52 = x D. x2 = 5
Solve the problem.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is 
where s is in feet below the window. How long (to the nearest tenth) will it take the ball to fall 66 feet?
A. 1.7 sec B. 1.1 sec C. 1.3 sec D. 2.0 sec
Solve the problem.A simplified economy has only two industries, the electric company and the gas company. Each dollar's worth of the electric company's output requires 0.20 of its own output and 0.4 of the gas company's output. Each dollar's worth of the gas company's output requires 0.50 of its own output and 0.7 of the electric company's output. What should the production of electricity and gas be (in dollars) if there is a $16 million demand for electricity and a $7 million demand for gas?
A. Electricity: $115 million; gas: $103.5 million B. Electricity: $107.5 million; gas: $100 million C. Electricity: $125 million; gas: $92.5 million D. Electricity: $97.5 million; gas: $103 million