math help please

Question

Find the circumference of each circle, use 3.14 for . Include units and round to the nearest tenth. Show work.

7.The circumference of a circle is 34.54 cm. What is the diameter and radius of the circle? (Show work)

8. What is the circumference of a circle in terms of , if it has a radius of 3.5 in?

(in terms of means do not substitute 3.14 for pi, leave the symbol in the final answer)

Answer 1

The formula for the circumference of a cirlce is Circumference = 2 x Pi x Radius. (Remember, the radius is half of the diameter.)

For questions 1-6, plug in the numbers in the formula.

For 7, we are given the Circumference, so plug in the known values and solve.

For 8, plug in the numbers in the formula, but leave Pi as Pi (i.e., do not substitute 3.14 for Pi).