This set of staircases grows at a different rate. How many blocks in all are needed to make a staircase with five steps

How many blocks make up the top step of a staircase with n steps

How many blocks make up the first level (the base) staircase with n steps

Given a staircase with 30 steps explain a process you might follow to determine the number of blocks necessary to build the staircase.

( PLEASE HELP)

Can someone me i’m confused. will give brainliest and a whole bunch of points

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

The length and width of a rectangle are consecutive even integers the area of the rectangle is 120 squares units what are the length and width of the rectangle