Question

Molly's alarm clock fell to the floor and the glass face was broken. Molly measured the glass face so that she could order a new one.

The radius of the circle-shaped glass face is 5 centimeters. What is the approximate area of the glass face? (Use 3.14 for .)

31.4 cm2
314 cm2
78.5 cm2
15.7 cm2

Answer 1

@inowalst

Answer 2

The radius is half of the diameter. Double the radius. Then multiply that by 3.14.

Answer 3

idk

Answer 4

what is half the radius

Answer 5

It says the radius is 5. Double 5. What do you get?

Answer 6

55

Answer 7

5^2 * pi =...?

Answer 8

If you double 5.. Double means 2. Multiply 5 times 2. What do you get?

Answer 9

10

Answer 10

Good. Now multiply that times 3.14.

Answer 11

\[5^{2} \times \]

Answer 12

No. 5 to the second power is 5 times 5 which is 25. We need to find, 5 times 2.

Answer 13

78.5

Answer 14

Used the equation editor wrong

Answer 15

Meh, i hate my internet, -_-. Ino is right

Answer 16

@logan13 Did you multiply 10 times 3.14? The answer is not 78.5.

Answer 17

yes it is

Answer 18

10 times 3.14 is not 78.5. Think of the 10 as a 1, without the zero. Your answer is 3.14, but you have to move the decimal one place to the left. Your answer is 31.4.