What is the answer to the problem 4x+7+3x^2

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?

32a³b² 8ab² simplify the following expression.

The statement tan theta= -12/5, csc theta=-13/12, and the terminal point determained by theta is in quadrant two