Lorrie Wants to determine the average amount of time that student at her school spend in the computer each day there are 350 students in 15 classes the number of boys and girls is approximately equal which is the most random sample

Darcy deposited $390 into a savings account. as long as the account balance remains at or above $150, she does not have to pay a service fee for the account. for how many months can she withdraw $40 a month without having to pay service fees? a) 3 b) 5 c) 6 d) 9