Answer: 10
Step-by-step explanation:
If there is 4 cups in a quart, then it is 2
if there are 2 cups in a quart, then the answer is 1
Answer:

Step-by-step explanation:
The formula of the circumference of a circle is
.
The length of an arch can be found by using the ratio of circumference to the arc.
First, find the circumference of the circle:

Then you find the ratio:
The length of the arc is 90/360, which is 1/4, of the circumference.
Finally, find the length of the arc:
or 
I hope this helps :)