**Answer:**

A. 31.4 in.

**Step-by-step explanation:**

Formula for the circumference:

C = dπ (d = 2r)

Therefore:

C = 10π

C = 10 · 3.14

C = 31.4 in.

Carol bought...

4 CDs worth $4.95: 4 x 4.95 = $19.80

3 books worth $6.25: 3 x 6.25 = $18.75

19.80+18.75=$38.55 (total)

change: 40-38.55 = $1.45

answer: $1.45

30 3/4 + 12 1/4 + 16 1/4 = 59 1/4

72 - 59 1/4 = 12 3/4

Buenos tardes!

**Answer:**

When a figure is dilated by a scale factor of a/b, then the new perimeter is a/b of the original perimeter and the new area is a 2 b 2 of the original area. Therefore, if the hexagon is dilated by a scale factor of , then the new perimeter is of the original perimeter.