Acircle that originally had a circumference of 31.4 cm, now has a circumference of 15.7 cm. what happened to the radius? it was doubled. it was divided by two. it was quadrupled. it was divided by four.

The radius was divided by 2.

31.4 = 2pi * r

31.4/2pi = 15.7/pi

15.7 = 2pi * r

15.7/2pi = 7.85/pi

(7.85/pi) / (15.7/pi) = 1/2

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5

-4

step-by-step explanation:

do 6-10=

if u need it to be negative.