Answer:
Step-by-step explanation:

If you take 230 subtract from 180 you will get 50 so the price for adult tickets are $50
Answer:
0.0713 = 7.13% probability that the result is positive.
Step-by-step explanation:
Probability of a positive test:
91% of 1/650(has the disease).
7% of 1 - 1/650 = 649/650(does not have the disease). So

0.0713 = 7.13% probability that the result is positive.
I think it is 2,504.
when you round 2,505 it comes out to 2,510.