Solve the problem. Use ? ? 3.14, as needed. For the target shown below, find the probability of hitting the shaded area. Assume that each point on the target is equally as likely to be hit.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find d2y/dx2 without eliminating the parameter.x = 1 - 10sin t, y = 1 + 9cos t, t ? n?
A. - 
sec t
B. - 
sec3t
C. 
cot t
D. - 
sec3t
Mathematics
Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 0.00142857 B. 700 C. 100 D. 0.07
Mathematics
Solve the problem.The minute hand of a clock is 4 inches long. How far does the tip of the minute hand move in 20 minutes? Round your answer to two decimal places when necessary.
A. 9.61 in. B. 10.89 in. C. 6.64 in. D. 8.38 in.
Mathematics
Factor completely. If the polynomial is prime, say so.25x2 - 80xy + 64y2
A. (8x - 5y)2 B. (8x + 5y)2 C. Prime D. (5x - y)2
Mathematics