Patrick B. answered • 01/05/19
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It increases $70 in 6 months which is 70/350 = 1/5 = 20%
The annual interest is 40%
Ayla B.
asked • 01/04/19The value of a rare coin increased in value from $350 to $420 in only 6 months.Find the simple interest rate for the value of the coin
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