Factor the difference of squares. If the polynomial cannot be factored, write "prime."r2 - 81s2
A. (r - 9s)(r + 9s)
B. (r2 - 9s)(r2 + 9s)
C. prime
D. (r - 9s)(r - 9s)
Answer: A
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Solve the equation for x, where x is restricted to the given interval.y = 8 cos 3x, for x in 
A. x = 3 arccos 
B. x = 
arccos 
C. x = 8 arccos 
D. x = 
arccos 
Solve the problem.After reviewing a movie, 1000 people rated the movie as excellent, good, or fair. The following data give the rating distribution. Draw a pie chart to represent the data.ExcellentGoodFair200?500?300
A. 
B. 
Solve the problem.If a projectile is fired with an initial velocity of v = 700 feet per second at an angle of 
with the horizontal, it will follow a parabolic path described by 
Assuming the ground is flat, find the total distance traveled by the projectile graphically.
A. 6994 ft B. 2271 ft C. 20 ft D. 13,989 ft
Determine the size of the matrix.
A. 3 × 3 B. 2 × 3 C. 6 × 6 D. 9