Answer:

Step-by-step explanation:
step 1
Find the area of the circle with a diameter of 9 units
we know that
The area of a circle is equal to

we have
----> the radius is half the diameter
substitute


step 2
Find the area of a square with a side length of 8 units
we know that
The area of the square is

where
b is the length side of the square
we have

substitute

step 3
Equate the areas

solve for 

Answer:
The second one
Step-by-step explanation:
Answer:
4 miles?
Step-by-step explanation:
Answer:
B. 125
Step-by-step explanation:
72 did not return the permission slips.
125-72= 53
So therefore 53 students are going on the field trip.