Leah and Marty each opened a savings account with a deposit of $100.
​Leah earned 2.5% simple interest per year.
​Marty earned 2% simple interest per year.
​Neither of them made additional deposits or withdrawals.
​​How much more did Leah receive than Marty after 3 years?

Respuesta :

Answer:

$1.57

Step-by-step explanation:

lets use the expression [tex]a(1+r)^t[/tex]

where a is the initial amount, r it the rate, and t is time

Leah: initial amount = 100, r = 2.5% = 0.025, t = 3

100(1.025)^3= 107.69

Marty: initial amount = 100, r = 2% = 0.02, t = 3

100(1.02)^3= 106.12

difference:

107.69 - 106.12 = 1.57