Question

Find the circumference and area of the circle. Express answers in terms of and then round to the nearest tenth. Part 1. Find the circumference in terms of . C = _ cmPart 2. Find the circumference rounded to the nearest tenth.C = _ cmPart 3. Find the area in terms of A = _ cm2Part 4. Find the area rounded to the nearest tenth. A = _ cm3

Answer 1

Answer:

1. C = 8π cm

2. C = 25.1 cm

3. A = 16π cm²

4. A = 50.3 cm²

Explanation:

Part 1.

The circumference of a circle can be calculated as

$C=2\pi r$

Where r is the radius. So, replacing r = 4 cm, we get:

C = 2π(4 cm)

C = 8π cm

Part 2.

To round the circumference to the nearest tenth, we need to replace π = 3.14, so

C = 8(3.14) cm

C = 25.1 cm

Part 3.

The area of a circle can be calculated as

A = πr²

Replacing r = 4cm, we get:

A = π(4 cm)²

A = 16π cm²

Part 4.

To round to the nearest tenth, we need to replace π = 3.14, so

A = 16(3.14) cm²

A = 50.3 cm²

Therefore, the answers are

1. C = 8π cm

2. C = 25.1 cm

3. A = 16π cm²

4. A = 50.3 cm²