Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 14 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Answer: B
Mathematics
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Subtract. Use borrowing, if necessary.
A. 820 B. 826 C. 726 D. 1020
Mathematics
Add or subtract as indicated.
+ 
A. 
B. 
C. 
D. 
Mathematics
Write the number in scientific notation.518.5
A. 5.185 × 103 B. 5.185 × 10-2 C. 5.185 × 102 D. 5.185 × 10-3
Mathematics
Simplify by factoring.
A. x - 110
B. (x - 1)9
C. (x - 1)9
D. (x - 1)8
Mathematics