Tập giá trị của sinx và cosx

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

Acircle has a circumference of 28.36 units what is the diameter of the circle

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?