The function f(r) gives the area of a circle with radius r. it can be written in equation form as f(r) = 3.14r2. what is f(4)?
a. 50.24
b. 25.12
c. 19.14
d. 157.75

Option 'A' is correct.

Step-by-step explanation:

Since we have given that

the function f(r) givens the area of a circle with radius r.

i.e.

Put the value of r = 4 as we have to find the value of f(4) .

Hence, Option 'A' is correct.

answer: i think it is (1,-2)

the answer is b: 18

step-by-step explanation:

use the pythagorean theorem to .

a^2+b^2=c^2

plug 18 for "r"

the 2 legs are 18 and 24

18^2+24^2=c^2

324+576=c^2

900=c^2

c=30

30-12=18

18 is the radius

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