Answer:
$39 is the correct answer .
Step-by-step explanation:
Let the amount he earned on the afternoon be x then
Amount earned in morning + Amount earned in afternoon=total amount
Therefore $39 is the amount he earned on afternoon .
here you can do it and other problems you have https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator
I need the picture of the pyramid to solve.
hope it helps you.......