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Marcus and three of his friends are guessing the radius of a circular pond. They read that the circumference is 157 ft, so they can use the equation 3.14*2r=157 to determine which of these guesses which form the replacement set {20,25,30,35} is correct?.

What is the radius of the pond?

A. 20ft
B. 25ft
C. 30ft
D. 35ft

Respuesta :

calculista

Answer:

Option B. 25 ft

Step-by-step explanation:

we know that

The circumference of a circle is equal to

[tex]C=2\pi r[/tex]

we have

[tex]C=157\ ft[/tex]

assume

[tex]\pi =3.14[/tex]

substitute in the formula

[tex]157=2(3.14)r[/tex]

Solve for r

Divide by 2(3.14) both sides

[tex]r=157\(2(3.14))[/tex]

[tex]r=25\ ft[/tex]

sunshinet1983

Answer:

25 ft

Step-by-step explanation:

2.08 Quiz: Replacement Sets