Answer:
Explanation:
We can use the simple interest formula to solve this problem:
I = P x r x t
where:
I = interest earned
P = principal or amount of money invested
r = interest rate
t = time period
In this case, we know that the interest earned is $20, the interest rate is 10% per year, and the time period is 2 years. We can plug these values into the formula and solve for the principal P:
$20 = P x 0.10 x 2
$20 = P x 0.20
P = $20 / 0.20
P = $100
Therefore, you put $100 into the savings account.