Answer:
$900
Step-by-step explanation:
The total amount of money Robin will have after 20 years can be calculated using this formula for simple interest:
Total amount = Principal + (Principal * rate * time)
In this case, the principal amount is $500, the interest rate is 4% (0.04 as a decimal) and the time is 20 years.
Plugging these values into the formula, we get:
Total amount = $500 + ($500 * 0.04 * 20)
Total amount = $500 + ($500 * 0.8)
Total amount = $500 + $400
Total amount = $900
So, after 20 years, Robin will have a total of $900 in her savings account.
