Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = cos
A. 0
B. 1
C. 
D. No limit
Answer: D
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Multiply.(3x2 - 3x - 4)(x2 + 2x + 4)
A. 3x4 + 3x3 + 6x2 - 20x - 16 B. 3x4 + 3x3 + 2x2 - 20x - 16 C. 3x4 + 6x3 + 6x2 - 20x - 16 D. 3x4 + 6x3 + 2x2 - 20x - 16
Determine whether the geometric series converges or diverges. If it converges, find its sum.
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Solve the problem.A company manufactures two types of lawn mowers, a gas-powered model and an electric model. The company's production plan calls for the production of at least 940 mowers per month. Write the inequality that describes the production plan, if x represents the number of gas-powered mowers and y represents the number of electric mowers.
A. x - y ? 940 B. x + y ? 940 C. x + y ? 940 D. x - y ? 940
The formula for compound interest is 
where A is the amount accumulated from a principal of P dollars left untouched for n years with an annual interest rate r (expressed as a decimal). Use this formula and a calculator to find A to the nearest cent.P = $50, r = 0.09, n = 5
A. $480,819,985.91 B. $76.93 C. $176.93 D. $272.50