Respuesta :

it must take 5 hours for mowing one lawn. so for one lawn is 70 dollars. 70*12=840

answer= 840
Lindsey earned $70 for working 5 hours.

5 hours per lawn = $70 earned

Let's break it down.

1 lawn = $70 
1 lawn = 5 hours -- IRRELEVANT TO QUESTION

1 x 12 = $70 x 12
12 lawns = $840