Solve the problem.Solve the formula S = 2?rh + 2?r2 for r by writing it in the form ar2 + br + c = 0 and then using the quadratic formula.
A. r = 
B. r = 
C. r = 
D. r = 
Answer: D
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Between 1995 and 2005, each year the number of Internet domain hosts was 1.41 times the number of hosts in the preceding year. In 1995 the number of hosts was 8.7 million.
?
A: Explain why the number of domain hosts was an exponential function of time over the period from 1995 to 2005..
?
B: Write a formula that gives the number D, in millions, of domain hosts t years after 1995.
?
?
C: Make a graph that shows the growth of domain hosts from 1995 to 2005, that is, for 
to 
.
?
D: According to this model, when did the number of domain hosts reach 23 million? Round your answer to two decimal places.
What will be an ideal response?
Solve the given differential equation.tan 
dq + p dp + q dq = 0
A. ln 
= -2q + c
B. ln 
= 2q + c
C. q = -2 ln 
+ c
D. ln 
= -2q
Use the order of operations to evaluate each problem.14 + 28 ? 22 - 21
A. 903 B. 609 C. 0 D. 43
Solve the problem.EJ can overhaul a boat's diesel inboard engine in 30 hours. His apprentice takes 60 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?
A. 12 hr B. 8 hr C. 20 hr D. 90 hr