I’m pretty sure it’s 11. So answer D
Since the cost of the spray paint is approx $1.50,
The range for the cost of the spray paint is'

Therefore, the coach budget should be between,

Hence, the budget of the coach should be between $1.45 and $1.55.
Since grades are out of 100, you can just subtract 75 from 90 which is 15. the percent of increase in the student's grade is 15%