7 because a(one side)= 1/sqrt2 * hypotenuse (7*sqrt2) THis equals 7
Answer:

Step-by-step explanation:
we know that
The circumference of a circle is equal to

In this problem we have

substitute

Remember that
subtends the arc length of the complete circle
so
by proportion
Find the measure of the central angle for an arc length of 

45
1080 divided by 24
45
45 5lbs per hour
The correct answer is the fourth one 324\pi cm3