Let A be the set of whole numbers bigger than 3 and smaller than 10 and B the set of positive whole numbers smaller than 8. Which of the following sets is equal to A U B?

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