Find the APPROXIMATE Circumference Round to the tenth and use pi = 3.14
Radius is 12

75.4

Step-by-step explanation:

Circumference = 2rπ

where r = radius

We are given that the circle has a radius of 12

We are also told to use 3.14 for pi

Given this we want to plug in the values into the circumference formula

Recall Formula : C = 2rπ

r = 12 and π = 3.14

* plug in values *

C = 2(12)(3.14)

multiply 2 and 12 to get 24

C = 24(3.14)

multiply 24 and 3.14 to get 75.36

C = 75.36

round to nearest tenth

C = 75.4

And we are done!

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.