Well 75x12=900 so 900 divided by 40 is 22.5 so 22 teachers can have 40 chalks but the principal needs to order another 20 :)
Answer:

Step-by-step explanation:
Given

--- domain
Required
Determine the range
To do this, we simply substitute the values of n in the given expression
So, we have:






Hence, the range is:

<span>A meeting lasted from 11:15 am until 1:00 pm. how long was the meeting?
We have 1:00 pm= 13.00
13.00-11.15= 1.45
The meeting was 1 hour and 45 minutes</span>