Find the domain of the function.f(x) = x2 + 2
A. (-2, ?)
B. [-2, ?)
C. (-?, -2) ? (-2, ?)
D. (-?, ?)
Answer: D
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Solve.A farmer's silo is the shape of a cylinder with a hemisphere as the roof. If the height of the silo is 113 feet and the radius of the hemisphere is r feet, express the volume of the silo as a function of r.
A. V(r) = ?(113 - r)r3 + 
?r2
B. V(r) = ?(113 - r)r2 + 
?r3
C. V(r) = ?(113 - r) + 
?r2
D. V(r) = 113?r2 + 
?r3
Perform the division. Write the answer with positive exponents.(56x8 + 63x6 + -28x3) ÷ (7x3)
A. 56x5 + 63x3 - 28 B. 8x8 + 9x6 - 4x3 C. 8x5 + 9x3 - 4 D. 8x5 + 63x6 - 28x3
Simplify, if possible. If the answer is undefined, state so.
A. 2 B. 1 C. 0 D. -2
Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.2
÷ 2
A. 1
B. 1
C. 2
D. 1