You roll a die numbered from 1 to 6. what’s the probability you roll a 5 ? fraction and decimal

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?

Will give brainliest sum of arithmetic series (sigma notation) find the numerical answer to the summation given below. (image shown below)

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.