A population growing at an annual rate r will triple in a time t given by the formula 
If the growth rate remains constant and equals 15% per year, how long will it take the population of the town to triple?
A) 8.1 years
B) 3.2 years
C) 2.7 years
D) 7.3 years
E) 1.2 years
D) 7.3 years
Mathematics
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Translate the given formula to an English phrase using the word "varies".A = ?r2, where A is the area of a circle of radius r.
What will be an ideal response?
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The graph of a function f is given. On the same axes, sketch the graph of f-1. 
A. 
B. 
Mathematics
Add or subtract.-11.5 - (-5.1)
A. 16.6 B. 6.4 C. -16.6 D. -6.4
Mathematics
If possible, solve the system below by the method of substitution. Use the graph to check the solution.
A. 
B. 
C. 
D. 
E. 
Mathematics