# Algebra

posted by Carmen

Suppose the growth of a population (in thousands) is represented by the expression 32 * 2.1^x where x represents the number of years since 2010. Evaluate the expression for they year 2015. Round to the nearest whole number.

A. 41
B. 1,307
C. 67
D. 622

Is it B or D??

1. Steve

what, no calculator?

Since 2015 is 5 years from 2010, you want to evaluate

32 * 2.1^5 = 1306.9

D should have been clearly wrong, since 2^5=32, so 32*32 = 1024 would be a good guess, though somewhat low.

2. Yosabeth

-3x+9=-16+2x

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