Answer:

Step-by-step explanation:
Given


Required
The distance between the top and John
The distance is calculated using:

Where
--- the angle between the diagonal line and the vertical line


So, we have:






<em> --- approximated</em>
A.
8*8=64
9*9=81
as you can see it would be between these 2
the question isn't true so that means it's false
Answer:
30 students
Step-by-step explanation:
Given

---- percentage of those that returned their slips
Required
Determine the number of those that returned their slips
Represent the number with n
To calculate n, we simply multiply the number of students by the percentage of those that returned their slips
i.e.

Convert % to decimal


<em>Hence, 30 students returned their slips</em>