Answer:

Step-by-step explanation:
Given
--- selected customers
--- those that are expected to use the restroom
--- proportion that uses the restroom
Required

The question illustrates binomial probability and the formula is:

So, we have:




Answer:
The second answer
Step-by-step explanation:
P'Q'R' is simply rotating PQR 90 degrees, it does not change the angle that it makes
At the time the cannonball reaches the ground, the vertical height of the cannonball from the ground is 0, i.e. h = 0.
Thus, the time it will take the cannonball to reach the ground is given by

Therefore, it will take the cannonball 8 seconds to reach the ground.
The answer to this problem is 1/6.