Question

Work out the area of this circle.

Take it to be 3.142 and give your answer to 1 decimal place.

4 cm

Answer 1

To calculate the area of a circle with a 4 cm radius, square the radius to get 16 cm² and then multiply by 3.142 to get 50.272 cm², which rounds to 50.3 cm² to one decimal place.

Step-by-step explanation:

The question is asking to calculate the area of a circle with a given radius of 4 cm using 3.142 as an approximation for π. To find the area, we use the formula A = πr². First, square the radius: 4 cm × 4 cm = 16 cm². Then multiply by π: 3.142 × 16 cm² = 50.272 cm². Finally, since the question asks for the answer to one decimal place, we round 50.272 to 50.3 cm².

Answer 2

→Answer:

`50.3cm^2`

→Step-by-step explanation:

Well the formula for the area of a circle is
`\pi r^2`.

→Given information

Pi is 3.142

radius is 4 cm

answer must be rounded to the nearest tenth

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So now we have to plug in the given information into the following formula
`\pi r^2`.

(3.142)(4)^2

So now we have to solve this formula using PEMDAS.

So 4 squared is 16 and 16*3.142 is 50.272cm^2.

The question clearly states the given answer must be rounded into the nearest tenth so 50.272 is 50.3 cm^2.

__________________I do hope this helps!__________________________