Answer:
She can mow 25 lawns
Step-by-step explanation:
The first thing you want to do is find out how many lawns she can mow in 1 hour so you divide 5 by 8, which gives you 0.625. Then your going to mutiply 0.625 by 40 because now your trying to find how many lawns she can mow in 40 hours, which gives you 25 lawns.