Determine the symmetries of the curve.r = 7 cos 3?
A. y-axis only
B. x-axis, y-axis, origin
C. Origin only
D. x-axis only
Answer: D
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Simplify the expression. (Assume that r, s, and t are positive.)
?
?
A. 
B. 
C. 
D. ?
E. ?
During the construction of a high-rise building, a worker accidentally dropped his portable electric screwdriver from a height of 144 ft. After t sec, the screwdriver had fallen a distance of 
ft.
?
What was the velocity of the screwdriver at the time it hit the ground?
?
A. 12 ft/sec B. 48 ft/sec C. 768 ft/sec D. 96 ft/sec
Solve the problem.Jim has gotten scores of 98 and 70 on his first two tests. What score must he get on his third test to keep an average of 80 or better?
A. at least 82 B. at least 84 C. at least 72 D. at least 70
Plot the two points given by the ordered pairs.A(2, 5), B(-3, 1)
A. 
B. 
C. 
D. 