4. In a rectangle the ratio of length to width is
3:1. What is the width of the rectangle if
its length is 12 cm?

I NEED HELP NOW FAST PLEASE THE CORRECT ANSWER I AM ONLY IN FORM 1​

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

What is the reflection image of (5,-3) across the line y = -x?

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?