Question

the diameter of a quarter is 23.9mm. Find the circumference.

Answer 1

To find the circumference of a circle, you use the formula d(pi) So what do you think you do?

Answer 2

so 3.14 times 23.9

Answer 3

Well, you want to use the calculator to get the circumference as close as possible.

Answer 4

not sure

Answer 5

You have a calculator?

Answer 6

yeah

Answer 7

Alright, so type in 23.9. Next click the multiply button, and then the pi button. What does that give you?

Answer 8

75.084

Answer 9

is that the answer?

Answer 10

Nice rounding. Well yes. You would get an irrational number, so you must round it.
You can round it to 75.084, or 75.1, or just 75.
Either way, it would still be correct.

Answer 11

I hope this help! :)

Answer 12

By the way, make sure to write the unit, mm. :)

Answer 13

thanks a lot! you really did help