Question

Please help, I need to get this done!
I need to get number 16, 17, and 18 done please help!!!!​

Answer 1

16) 62.8 m²

17) 19.4 m²

18) 103.5 m²

Explanation:

The formula to find area of a circle is:
`\pi r^(2)`. To find radius, find the half of the diameter.

To solve number 16, first find the area of the unshaded circle using the formula:
`\pi 4^(2)`. This is also 3.14*16. Multiply to get 50.24 m². Now find the area of the larger circle using the formula:
`\pi 6^(2)`. This is also 3.14*36. Multiply to get 113.04 m². Now subtract 113.04 - 50.24 to get the shaded area or 62.8 m².

To solve number 17, first find the area of the square using the formula: side x side. In this case multiply: 5.25 x 5.25 to get 27.5625. Round to the nearest tenth to get 27.6 m². Now find the area of the circle using the formula:
`\pi 2.625^(2)`. This is also 3.14*2.625. Multiply to get 8.2425. Round to the nearest tenth to get 8.2. Subtract 27.6 - 8.2 to get 19.4 m².

To solve number 18, find the area of one unshaded circle using the formula:
`\pi 1.75^(2)`. This is also 3.14*3.0625. Multiply to get 9.61625. Round to the nearest tenth to get 9.6 m². Add 9.6 + 9.6 to find the area of both unshaded circles. You get 19.2 m². Now find the area of the shaded circle using the formula:
`\pi 6.25^(2)`. This is also 3.14*39.0625. Multiply to get 122.65625. Round to the nearest tenth: 122.7. Subtract 122.7 - 19.2 to get 103.5 m².

Hope it helps and is correct!