Which of the following is the divisibility rule for 3? * 1 point
A. Adds up the digits. The sum must be even and divisible by 3.
B. The digits must add up to 9.
C. The last digit must be a 3.
D. Adds up the digit​

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?