The function graphed is of the form y=a sin bx or y=a cos bx, where b > 0. Determine the equation of the graph.

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

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?

What is the sum of the first 8 terms of the geometric series