30 POINTS! RIGHT ANSWERS ONLY! PLEASE! Thank you, explanation is optional. Each picture is in order please answer them in order

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.