Edward deposited $5,500 into a savings account 5 years ago. The simple interest rate is 5%. How much money did Edward earn in interest? I really need help♡︎!

The water company charges a residential customer $41 for the first 3,000 gallons of water used and $1 for every 200 gallons used over 3000 gallons. if the water bill was $58 how many gallons of water were usedanswersa 3400 gallonsb 6000 gallonsc 6400 gallons d 7000 gallons