barney earns $24.75 in three hours. if the amount that he earns varies directly with the numbers of hours, how much would he earn in 20 hours?

That depends on the growth rate, which isn't given. Assuming Barney earns $24.75 every three hours, he would have earned about $2,588 after 20 hours had passed.

Step-by-step explanation:

Set up exponential growth equation

Calculate