Let's set variables to the different tickets:
S is senior tickets, and A is adults.
If there were 414 tickets sold, then
414 = A + S
If the total amount sold was $6173 and adults tickets were $20 and senior tickets were $13, then
6173 = 20A + 13S
We can then put these two equations into a system of equations:

We can single out one of the variables in the simpler equation to solve for the other:

Now that we have A, we can plug it into the other equation:

We plug in 414 - S for A, then we factor in the 20. Then we subtract 8280 from both sides and combine the two Ss. Then we divide both sides by -7.
The theatre sold 301 senior tickets and 113 adult tickets.
Answer:
about 0.177 mg/mL
Step-by-step explanation:
The maximum is found where the derivative of C(t) is zero.
dC/dt = 1.35e^(-2.802t) -(1.35t)2.802e^(-2.802t) = 0
Solving for t gives ...
t = 1/2.802
So, the maximum C(t) is ...
C(1/2.802) = 1.35/2.802e^(-1) ≈ 0.177 . . . . . mg/mL
The maximum average BAC during the first 6 hours is about 0.177 mg/mL.
_____
The maximum occurs about 21 minutes 25 seconds after consumption.
I got 141.12 cm^2 by doing A= (a+b /2)x height
Step-by-step explanation:
range=highest -lowest
=9-1
=8
mode=greatest frequency
=9