Natalie opened a bank account that earns 2.5% simple interest. if her account earned $180 over the next ten years, how much was natalie’s initial deposit when she opened the account?

$720.

Step-by-step explanation:

The formula to find the simple interest is given by :-

, where P is the principal amount , r is the rate of interest in decimal and t is the time in years.

Given : Rate of interest : r= 0.025

Simple interest : I= $180

Time : t=10

Let P be the Natalie’s initial deposit when she opened the account, then we have:-

Hence, the Natalie’s initial deposit when she opened the account was $720.

Step-by-step explanation:

36 m : 72 m = 6 sec :__12sec__