Find the area of the region specified in polar coordinates.the region enclosed by the curve r = 3 cos 3?
A. 
?
B. 
?
C. 
?
D. 
?
Answer: A
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Solve. The polynomial -0.3t2 + 12t describes the average number of digits that participants in a memorization experiment were able to recall after t minutes. Find the average number of digits recalled after 9 minutes. Round your answer to the nearest digit.
A. 104 digits B. 84 digits C. 124 digits D. 64 digits
Use the vertical-line test to determine whether the graph represents a function.
A. Yes B. No
The area of the polygon is given. Write a polynomial that represents the missing length. 
A. 3 + 2x2 B. 3x + 2x2 C. x + 2x2 D. 6x + 6x3
Solve the problem.Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken is walking at the rate of 1.3 feet per second. Find a function, d(t), which gives the distance Ken is from the streetlight in terms of time. Find a function, 
, which gives the length of Ken's shadow in terms of d. Then find 
. What is the meaning of 
?
A. (S ? d)(t) gives the distance Ken is from the streetlight in terms of time. B. (S ? d)(t) gives the time in terms of Ken's distance from the streetlight. C. (S ? d)(t) gives the length of Ken's shadow in terms of time. D. (S ? d)(t) gives the length of Ken's shadow in terms of his distance from the streetlight.