Mariko has a job mowing lawns that pays $7 per hour. Who would make more money for working 10 hours? Explain or show work.

Step-by-step explanation:

Mariko would make 7*10=70 dollars for working 10 hours. Kell's hourly rate can be found by dividing the money earned by the hours worked each day.

Monday Wednesday Friday

Time worked 1.5 hours 2.5 hours 4 hours

Money earned $12.60 $21.00 $33.60

Pay rate $8.40 per hour $8.40 per hour $8.40 per hour

If Kell works for 10 hours at this same rate, he will earn 8.4*10=84 dollars. So Kell will earn more money for working 10 hours.

Alternatively, we could reason proportionally without computing the unit rate. Since Mariko earned $21.00 for 2.5 hours, she will earn four times as much for working four times as long (10=4*2.5), for a total of 4*$21=$84.