Alaska's glacier bay national had 431, 986 visitors in one year the next year the part had 22,351 more visitors than a year before how many people visited during the two years

An unknown number of kids and buses are getting assigned. when assigning 4 kids to each bus, there are 2 kids that aren't placed in a bus. when assigning 8 kids to each bus, there are 2 empty buses. how many total kids are there?

Which one ? is the answer and how to find this answer

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank