Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 8 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: C
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Find the sum of the series.
A. 27 B. 24 C. 15 D. 21
Solve the problem. Bethany decides to knit scarves to sell at her town's monthly craft show and wants to know how much money she will make. The cost of materials is $5 per scarf, and she plans to charge $15 for them. Using P for her profit and N for the number of scarves, write an equation for her monthly profit and graph it, assuming she does not sell more than 25 scarves in a month.Monthly Profit
A. P = $10N
| Monthly Profit |
B. P = $15N - $5
| Monthly Profit |
C. P = $15N - $5
| Monthly Profit |
D. P = $10N
| Monthly Profit |
Find the volume of the pyramid. If necessary, round to the nearest hundredth.
A. 1120.1 mi3 B. 356.72 mi3 C. 535.08 mi3 D. 1070.16 mi3
Round the whole number to the given place value.35, tens
A. 40 B. 50 C. 30 D. 43