First of all, Elena is kinda dumb why put brochures on only 80%? Nevertheless, 400 letters will not contain a brochure. If you need an explanation just comment that you need one on this.
We need to find the maximum (Vertex of the function)
Let:
L = Length = 1500 - 2x
W = Width = x
The area is given by:

We can find the maximum using the following formula:

Evaluate the area for the value we found previously:

The largest area that can be enclosed is 281250m²
I think the answer its 42.91
Total Attendence = Mean Attendence × No. of Incidents
= 24,500 × 25
= 612,500.
Answer:
Step-by-step explanation:
Move the circle to (0,5) and than the other coordinate