Answer: Each donor donated $70.5 per lap.
Step-by-step explanation:
1. If she got 8 donors and each one of them sponsored 5 laps, then the total number of laps was:
[tex](8)(5)=40[/tex] laps
2. Hailey raised a total of $2,820, therefore, you can calculate the amount of money donated by each donor (which you can call [tex]x[/tex]) by dividing $2,820 by 40 laps, as you can see below:
[tex]x=\frac{2,820}{40}\\x=70.5[/tex]
