Step by steps

Alisa is choosing new tile for the floor in her dining room which is in the shape of a square with side lengths x feet. The tile costs $3.47 per square foot. Complete parts a through c

Find the Laplace transform F(s) = {f(t)} of the function f(t) = 9t5 - t + 9, defined on the interval t 0 by completing the steps:

Solve for x step by step 0.95 = x - x/1 + x/0.511(1 - cos 180) = x - x/1 + x/0.511 (2)

There is a escalator and 2 persons move down it. A takes 50 steps and B takes 75 steps while the escalator is moving down. Given that the time taken by A to take 1 step is equal to time taken by B to take 3 steps. Find the no. of steps in the escalator while it is staionary.