Identify the axis of symmetry for the graph of F(x)= x2 +2x -3 A- y=-4

B- y=-1

C- x=-1

D- x=-4

Icould really use some with this question.

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?

Find the missing factor. write your answer inexponential form.9^2=9^4×