helpme6191 helpme6191
  • 06-05-2019
  • Mathematics
contestada

How do you do this?please help

How do you do thisplease help class=

Respuesta :

cblue8282 cblue8282
  • 06-05-2019

Answer:

10.5 ft.

Step-by-step explanation:

1. Find the radius of the larger circle

4/7 = 3/r --> the ratio should be constant

cross-multiplication: 21 = 4r

Divide: r = 5.25 ft.

2. Find the circumference

Equation: C = 2πr

C = 2π*5.25

C = 10.5π ft.

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