?Use a graphing utility to graph the function 
. Be sure to choose an appropriate viewing window.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: A
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Solve the problem.A circular sector has an area of 18 in2 and an arc length of 3 inches. What is the measure of the central angle in degrees? Round to the nearest degree.
A. 29° B. 7° C. 5° D. 14°
Solve the problem.A stone is thrown into a pond. A circular ripple is spreading over the pond in such a way that the radius is increasing at the rate of 4.2 feet per second. Find a function, r(t), for the radius in terms of t. Find a function, A(r), for the area of the ripple in terms of r. 
A. (A ? r)(t) = 8.4?t2 B. (A ? r)(t) = 17.64?t2 C. (A ? r)(t) = 17.64?2t D. (A ? r)(t) = 4.2?t2
Approximate the value using a calculator. Express answer rounded to three decimal places.34.7
A. 174.771 B. 14.100 C. 27.000 D. 103.823
Add or subtract as indicated.
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A. 
B. 
C. 
D. 