No need to show the work just explain simply how you got it!
Thanks!

see below

Step-by-step explanation:

For every hour, she gets 9 dollars,so multiply each hour by 9

For h hours, she gets 9h dollars

She will earn 9 * h dollars if she works h hours

Let h = 3.5

9*3.5 =31.50

For 3.5 hours  she will get  $31.50

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice