At a zoo, the lion pen has a ring-shape sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 10 m. The inner edge of the sidewalk is a circle with a radius of 7 m. Find the approximate area of the blue circle. Use 3.14 to approximate n. 10 m 7 m​

160.14m²

Step-by-step explanation:

Area of circle = πr²  = 3.14r²

Area of sidewalk = area of outer circle  - area of inner circle

a = 3.14 * 10² - 3.14 * 7²

a = 3.14 * 100 - 3.14 * 49

a = 314 - 153.86

a = 160.14

160.14m²

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.