If you could answer both, it’ll be very appreciated (15 points if answered)

Carter drank 15.75 gallons of water in 4 weeks. he drank the same amount of water each day.a. estimate how many gallons he drank in one day.b. estimate how many gallons he drank in one week.c. about how many days altogether will it take him to drink 20 gallons?

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Which one ? is the answer and how to find this answer