what is the area of a circle with radius of 7cm using 3.14 for pi and round to he nearest tenth plz hurry

Mathematics

2 answers:

Sophie [7]3 years ago

5 0

Answer:153.9 cm

Step-by-step explanation:

The area of a circle is found by pi × radius squared and pi is aprox 3.14 so 3.15×7² = 153.86 then round off to the nearest tenth you get 153.9

Kisachek [45]3 years ago

4 0

153.9
U multiply the radius times pi times radius

You might be interested in

The ratio of the surface area of two cylinders is 1:9. The smaller cylinder has a radius of 3 inches and a height of 4 inches. W

lana66690 [7]

You need to multiply them 3-4 and get 12 so that's part of your answer

then you make it 12:9.

3 0

2 years ago

A rectangular prism has a length of 12 feet, a width of 6 feet, and a height of 2 feet.

aliina [53]

The volume of the prism is 144 ft^3. If we use the letter V to represent volume, the formula for the volume of a rectangular prism is V=length*width*height. When you plug in the numbers, the equation is V=12*6*2. When you multiply these three numbers together, you get 144. Because you are finding the volume, your units are cubed, so your answer is 144 ft^3. I have attached an image of this problem written out (I’m sorry if the image is bad, I drew it on my phone). If you need any more help or any clarification, please let me know and I will be happy to help!