Brainliest a roll of wallpaper has a diameter of 20 inches. what is the diameter of the roll of wallpaper when one-fourth of the material has been removed? a. 75 in b. 10 in c. 10 in d. 10 in

Fun problem. Let's just look at the side of the roll, it's a circle and we'll assume the wallpaper is rolled all the way up to the center.

The circle has area

When we use 1/4 of the roll we'll have 3/4 left. The material is proportional to the area of the circle we've been looking at, so we seek the radius r where

The diameter is twice that:

Answer

Choice b.

g

step-by-step explanation:

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.