What percent of 21 is 7?
2 answers:
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900 x² + 500 x= 1600 /:100
9 x² + 5 x = 16
9 x² + 5 x - 16 = 0
x 1/2 =
x = 1.084
The interest rate:
r = x - 1 = 1.084 - 1 = 0.084 = 8.4 %
Answer: D) 8.4 %
9 x² + 5 x = 16
9 x² + 5 x - 16 = 0
x 1/2 =
x = 1.084
The interest rate:
r = x - 1 = 1.084 - 1 = 0.084 = 8.4 %
Answer: D) 8.4 %