Please Explain/ Show your work!

Answer:
$1.50
Step-by-step explanation:
Lehana earns ...
I = Prt = $100·0.025·3 = $7.50
in 3 years.
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Marty earns ...
I = Prt = $100·0.020·3 = $6.00
in 3 years.
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Lehana earns $7.50 -6.00 = $1.50 more after 3 years.