Multiply the real numbers. Write any improper fraction as a whole or mixed number where appropriate.- 
(- 
)
A. - 4
B. - 2
C. 20
D. 44
Answer: C
Mathematics
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Write an iterated integral for 
S = {(x, y, z): 0 ? x ? 5y, 0 ? y ? 3, 0 < z ? 9}
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 16 B. 2 C. -2 D. not a real number
Mathematics
Provide an appropriate response.If x3 ? f(x) ? x for x in [-1,1], find 
f(x) if it exists.
A. 1 B. -1 C. 0 D. does not exist
Mathematics
Find the radian measure of the central angle of a circle of radius r that intercepts an arc of length s.r = 
feet, s = 7 feet
A. 21°
B. 
°
C. 
radians
D. 21 radians
Mathematics