Question

marla earned $400.00 interest over 2 years on a $4000.00 investment. jovita earned $960.00 interest over 4 yars on her $ 6000.00 investment. Who had the higher rate of interest?
Ms. Sue
I = prt

Maria:
400 = 4000 * r * 2

Jovita:
960 = 6000 * r * 4

600=4000*r*2
if $4000 invrsted at simple interest for two yrars earn #600 than rate of interest must be

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