Question 266270
 Michelle receives a 10 percent raise every year. 
Her salary after four such raises has gone up by what percent?
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If she starts at salary = x
1st raise she has x + 0.1x = (1.1)x
2nd raise she has (1.1)x + 0.1(1.1x) = (1.1)x(1.1) = (1.1)^2 x
3rd raise she has (1.1)^3 x
4th raise she has (1.1)^4x
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1.1^4 = 1.4641
1.4641x = x + 0.4641x
% increase = 46.41%
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Cheers,
Stan H.

 
(A) between 30 and 35 percent (B) between 35 and 40 percent
(C) between 40 and 45 percent (D) between 45 and 50 percent
(E) none of these