SOLUTION: the interest on an investment varies directly as the rate if interest. if the interest is $48 when the interest rate is 5%, find the interest when the rate is 4.2%?

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Question 501375: the interest on an investment varies directly as the rate if interest. if the interest is $48 when the interest rate is 5%, find the interest when the rate is 4.2%?
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
0.05/48=0.042/x
0.05x=0.042*48
0.05x=2.016
x=2.016/0.05
x=$40.32