Express x3 + 4x2 – 45x in factored form.

x(x – 9)(x + 5)

x(x – 9)(x – 5)

x(x + 9)(x + 5)

x(x + 9)(x – 5)

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: