A. x-4; x representing the cost of admission for adults.
b. $3.50
c. $6
The constant is -1 because a constant is a fixed number. You do -7+6=-1 to get the constant
Step-by-step explanation:
All 3 angles add up to be 180 due to sum of angles in a triangle.
Given this fact,

Answer:
Four significant figures
Step-by-step explanation:
Rules of significant figure:
1. Zeros before any non-zero digit are considered to be NON-significant.
2. Any zeros between any non-zero digits are SIGNIFICANT
0.505
Here, there are three significant digits: 505
3. Any zeros that are to the right of the decimal point and a non-zero number are SIGNIFICANT.
4.0000
4. All non - zero digit are significant
Therefore,
0.002040 has four significant figures
2040