Solve the problems.Video games made up 47.8% of the total revenue for a small specialty store. Write this percent as a decimal.
A. 47.8
B. 0.0478
C. 4.78
D. 0.478
Answer: D
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Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function 
where k is a constant and t is the time in years. If the current population is 12,000, in how many years is the population expected to be 30,000? (Round to the nearest year.)
A. 88 yr B. 7 yr C. 8 yr D. 15 yr
Solve the inequality. Write the solution in interval notation and graph the solution set.-21x - 18 ? -3(6x + 8)
A. (-?, 2]
B. (-?, 2)
C. [2, ?)
D. [2, ?)
Find an for the given geometric sequence.4, -12, 36, -108, 324, . . .
A. an = 4(-3n) B. an = a1 - 3n C. an = 4(-3)n - 1 D. an = 4(-3)n
Four books are selected from a set of seven books and arranged on a shelf. How many arrangements are possible?
What will be an ideal response?