Please need help:

The expressions 4(4^2)(8*2) and 4^5 are equivalent.

Show how the two expressions are equivalent. Describe the steps that can be applied to 4(4^2)(8*2) to create two equivalent expression 4^5

Which region represents the solution to the given system of inequalities? |-0.5x+y23 | 1.5x+ys-1 5 4 -3 -2 -1 1 2 3 4

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.