Answer:
7.51
Step-by-step explanation:
the hundredth place is the place 2 after the decimal. if the number after that is 5 or more, you round the number up, and if it is four or less you round the number down. so, it would be 7.51
99$
you take the 5.25$ per hour and multiply it by the 15 hours, and then you add the 20.25$ per month
31-40. C. 12 students sold that many, therefore it's the most.