use Mental Math to determine if the circumference of a circle with a radius of 5in will be greater than or less than 30 in write an argument that can be used to justify your solution​

Respuesta :

Answer:

It will be greater than 30.

Step-by-step explanation:

(Any following math is easy to do in your head and therefore mental math.)

In order to find the circumference, you multiply the diameter by pi.

The radius is half of the circumference so if you double the radius you get the circumference.

5 × 2 = 10

The default for pi is 3.14, so it's a little more than 3.

10 × 3 = 30

If just 3 is 30, then anything more ( like the 0.14), will make it over 30.

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