This question is simple I'm a little confused on the specifics so I will try my best to help.
s=θ(r)
arc length = angle x radius
2.46888m(or 8.1 ft) = (π/3) x r

Answer: x=2/e^2
Step-by-step explanation:
The distance between Layana's house and store is 4 units.
<u>Explanation:</u>
Given:
Coordinates of Layana's house = 
Coordinates of the store = 
It can also be written as:
Coordinates of Layana's house =
Coordinates of the store =
The distance between the house and the shop is:

On substituting the value we get:

Therefore, the distance between Layana's house and store is 4 units.
To solve this we'll put the question in this format: x% of y things = z things
We have the percent so we'll put in 60 for x.
Now the total number of balls will be considered y since we have the number of red balls but not blue ones. so we end up having..
60% of y balls = 720 balls
Of is another word for multiplication, therefore:
60/100*y=720
Solve for y
y=1200
So we have 1200 balls