Answer:
Alrighty lets work this out. Ethan has 20 dollars already so if we do the math we can subtract 100-20=80 so we know that Ethan needs to earn 80 more dollars to have 100 dollars in his savings account. We also know that Ethan earns $6.50 per hour so we can divide 80 from 6.50 which is 12.30, So he works 12 hours and 30 minutes more to earn one hundred dollars. I hope this helped!
Explanation: