Can someone explain why this statement is true. Thank you. Will Mark brianliest.

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

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?

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?