Question

Help!!!!!!!

Randy's circular garden has a radius of 4 feet. He wants to put a fence around the entire garden.
How much fencing will he need?
(a)
A 16 feet of fencing
B 20.4 feet of fencing
© 25.12 feet of fencing
D 37.16 feet of fencing
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(b)
If fencing material costs $0.75 per foot, how much will it cost Randy to build the fence?
$

Answer 1

(a)25.12 (b)$18.84

Explanation:

(a) The circumference or perimeter of a circle is
`2\pi r`. Since we know that the radius of the garden is 4 we find that the circumference of the garden is
`8\pi`, but we can round
`\pi` to 3.14, which gives us C 25.12 feet of fencing.

(b) We can plug in the circumference of the circle which we found in the first question into the equation
`circumference* \0.75` which gives us
`25.12* \0.75` or $18.84.

Answer 2

C) 25.12 feet and $18.84

Explanation:

C = 2(pi)(r)

Multiply feet by cost per foot