Please help me with this seventh-grade math work over pyramids

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b

30 points! here is a you are the new manager at trusty goods wholesale produce. you need to figure out how to adjust the amount of produce in your notes after the events of the day: you got 5 more crates of bananas someone returned 2 crates of apples a worker dropped a crate of grapes (oh no! , you had to throw them out) you sold a crate of bananas you sold 5 crates of apples can you write an expression to describe your day using: "a" for crates of apples "b" for crates of bananas and "g" for crates of grapes? make sure the expression is in simplest form question 2 (3 points) explain your steps using sentences.