The measure of an arc refers to the arc length divided by the radius of the circle. The arc measure equals the corresponding central angle measure, in radians. That's why radians are natural: a central angle of one radian will span an arc exactly one radius long.
So lets just simplify them first
1 batch = 2 3/4 so...
11/4 cups
and you need to make 3 1/2 batch so..
7/2 batch
then you just multiply it...
11/4 x 7/2
=77/8
=9 5/8
so you will need 9 5/8 cups
The pack of pencils weighs 21.6 grams because 0.9 times 24 is 21.6
