Find an equation for the line with the given properties.Perpendicular to the line 7x - 8y = -25; containing the point (1, 13)
A. -8x - 7y = -99
B. 7x + 8y = -99
C. -8x + 7y = -25
D. -8x + 7y = -99
Answer: A
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Solve the problem.Each cycle of a screen saver program generates and then erases numbers of little animated figures called froobies. The formula 
models the population, P, of froobies after x minutes within a cycle. How many minutes into a cycle will the froobie population first reach 117?
A. 7 min B. 10 min C. 4 min D. 5 min
Rewrite the expression as a single logarithm.log3(8) + log3(12)
A. log3(20) B. log6(20) C. log6(96) D. log3(96)
Simplify.?-7? + ?7 + 4?
A. 10 B. 4 C. 18 D. 21
Solve the problem.Suppose an isolated island has a native population of 9000 and a person from a visiting ship introduces a disease which has an infection rate of 0.00004. Assume that the rate of spread of the disease satisfies the following logistic equation: 
= k
y, where N is the size of the population and y is the number infected at time t.Write an equation for the number of infected natives after t days.
A. y = 
B. y = 
C. y = 
D. y = 