Please solve and receive brain list

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?