Solve the problem.How long will it take for the population of a certain country to triple if its annual growth rate is 1.6%? Use the exponential growth model 
Round to the nearest year.
A. 69 yr
B. 1 yr
C. 188 yr
D. 30 yr
Answer: A
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Integrate the function f over the given region.f(x, y) = xy over the triangular region with vertices (0, 0), (6, 0), and (0, 7)
A. 
B. 
C. 
D. 
Solve the problem.A generator produces an alternating current according to the equation 
, where t is time in seconds and I is the current in amperes. What is the smallest time t such that I = 12?
A. 
sec
B. 
sec
C. 
sec
D. 
sec
Solve the problem.One Internet service provider has the following rate schedule for high-speed Internet service:Monthly service charge$18.001st 50 hours of usefreeNext 50 hours of use$0.25/hourOver 100 hours of use$1.00/hourWhat is the charge for 50 hours of high-speed Internet use in one month?What is the charge for 75 hours of high-speed Internet use in one month?What is the charge for 135 hours of high-speed Internet use in one month?
Fill in the blank(s) with the appropriate word(s).
Solve.The three angles in a triangle always add up to 180°. If one angle in a triangle is 72° and the second is 5 times the third, what are the three angles?
A. 72°, 89°, 19° B. 72°, 88°, 20° C. 72°, 90°, 18° D. 72°, 91°, 17°