Solve the problem.The diagram below shows a rope connecting the top of a pole to the ground. The rope is 20 yd long and touches the ground 15 yd from the pole. How tall is the pole? Round approximations to the nearest tenth. 
15 yd
A. 17.5 yd
B. 6.6 yd
C. 13.2 yd
D. 87.5 yd
Answer: C
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Solve the problem.A survey of the interest rates earned by Certificates of Deposit (CDs) showed the following percents for the length of time (in years) for holding the CD. Let length of time represent the independent variable and interest rate represent the dependent variable. Use a graphing utility to draw a scatter diagram and to find the line of best fit. What is the estimate of the interest rate for a CD held for 30 years (to the nearest thousandth)? 
A. 8.669 B. 9.064 C. 8.874 D. 8.675
Find the exact value of the indicated trigonometric function of ?.tan ? = - 
, ? in quadrant IIFind cos ?.
A. - 
B. 
C. 
D. - 
Find the requested function value for the given function. Round the answer to the nearest tenth when necessary.If f(x) = 
, find the value of f(15).
A. 30 B. 22 C. 4.7 D. 5.5
Factor by grouping.m2s - m2t - as + at
A. (s - a)(m2 - t) B. (s - t)(m2 - a) C. (s - t)(m2 + a) D. (s - m2)(t - a)