Question

a circle has a diameter of 6, an area of b square units, and a circumference of c units. what is the value of b+c?

Answer 1

If a circle has a diameter of 6, then it has a radius of 3-an essential part of most circle related formulas.

Area =
`\pi r^(2)` =
`\pi`9

Circumference =
`2\pi r` =
`\pi`6

The question also refers to the area as "b" and the circumference as "c".

b + c = area + circumference =
`\pi 9 +\pi 6 = \pi 15`

If your teacher is asking for an exact answer, leave the pi symbol. Referring to pi is often times more exact than substituting it with 3.14 since sometimes 3.14 is not the ratio for every circle. Hope this helps!

Answer 2

If a circle has a diameter of 6, then it has a radius of 3-an essential part of most circle related formulas.

Area =
`\pi r^(2)` =
`\pi`9

Circumference =
`2\pi r` =
`\pi`6

The question also refers to the area as "b" and the circumference as "c".

b + c = area + circumference =
`\pi 9 +\pi 6 = \pi 15`

If your teacher is asking for an exact answer, leave the pi symbol. Referring to pi is often times more exact than substituting it with 3.14 since sometimes 3.14 is not the ratio for every circle. Hope this helps!