I don’t need you to explain just answer.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

How many ordered pairs of positive integers satisfy xy=32?

Which expression represents the total perimeter of her sandwich, and if x = 1.2, what is the approximate length of the crust?