Answer:
40
Step-by-step explanation:
The formula for area is LxW, in this case it’s 5x8 which is 40.
How many crayons are there in total? The answer is 9 boxes multiplied by 8 crayons which equals 72 total crayons.
The full range is

(length

), so the half range is

. The half range sine series would then be given by

where

Essentially, this is the same as finding the Fourier series for the function

Integrating by parts yields

So the half range sine series for this function is simply
300/5= 60
60x4(children)=240
240 seats will be for children and 60 seats for adults.