Solve the problem.The population of a particular country was 22 million in 1985; in 2000, it was 31 million. The exponential growth function 
describes the population of this country t years after 1985. Use the fact that 15 years after 1985 the population increased by 9 million to find k to three decimal places.
A. 0.146
B. 0.435
C. 0.023
D. 0.033
Answer: C
Mathematics
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Mathematics
Solve the problem.To approximate the speed of a river, a circular paddle wheel with radius 0.43 feet is lowered into the water. If the current causes the wheel to rotate at a speed of 14 revolutions per minute, what is the speed of the current? If necessary, round to two decimal places.
A. 0.07 mph B. 0.21 mph C. 37.82 mph D. 0.43 mph
Mathematics
Find the final amount.$4000 invested at 8% compounded semiannually for 6 years
A. $6347.50 B. $5061.28 C. $5920.00 D. $6404.13
Mathematics
Solve the exponential equation using the method of "relating the bases" by first rewriting the equation in the form eu = ev.ex - 6 = 
x + 2
A. 
B. 
C. 
D. 
Mathematics