Answer:

Step-by-step explanation:
Given
The attached graph
Required

This is the point where

On the attached graph;
when 
Hence:

Certin, because they can be any two cards.
B; 25.65+13.23+6.35=45.23
To do this mentally just add the 2 decimals places together first (1.23). Then just add the whole numbers (44). Then add the 2 numbers together, 44+1.23=45.23
Answer: a section holds 11,750 seats
$1,483,500 from one sold out event
47,000 seats in total, 3 sections (A = B + C)
A = B*2, C*2
47,000 / 4 = 11,750