What is the unit rate of 360 miles travled on 12 gallons of gasoline

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

Given the equation negative 4 square root x minus 3 equals 12

Need with this question with all work shown