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.
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A: Explain why the number of domain hosts was an exponential function of time over the period from 1995 to 2005..
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B: Write a formula that gives the number D, in millions, of domain hosts t years after 1995.
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C: Make a graph that shows the growth of domain hosts from 1995 to 2005, that is, for 
to 
.
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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?
B:
C:
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D: 2.83 years after 1995
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Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed.
A. (A ? B)' B. B - A C. A' ? B D. A' ? B
Solve.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 175 seconds are required to make a 
enlargement, find the time required for a 
enlargement.
A. 378 s B. 432 s C. 486 s D. 324 s
Find the mean. Round to the nearest tenth when necessary.The weights in pounds of the five books in Lynn's backpack are as follows: 2.5, 2.8, 3.1, 2.5, 1.6
A. Mean = 2.5 pounds B. Mean = 3 pounds C. Mean = 2.1 pounds D. Mean = 2 pounds
Write the expression without negative exponents.y = -5x-3 - x-2 + 2x-1 + 2x2 + 4x
A. y = - 
+ 
+ 
B. y = - 
- 
+ 
+ 2x2 + 4x
C. y = - 
- 
+ 
+ 
+ 
D. y = -5x1/3 - x1/2 + 2x2 + 6x