The circumference c of a circle may be expressed as a function of its radius r. given c=2πr, where 2π is a constant, express c as a function of r using f and find f(7), f(0.8), f(5/2). find the range of domain.

brainliest and 40 points

answer:

c = 2πr

1) divide both sides by 2π: r = c/(2π)

2) substitute 72π for c: r = 72π/(2π) = 36

3) a circle with circumference 72π has a radius 36.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )