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Answer:
The inverse is 
Step-by-step explanation:
Let x represent cost of each ticket and y represent cost of parking.
We have been given that the Singh's spent $335 for 5 people and parking. We can represent this information in an equation as:

We are also told that the Robinson spent $465 for 7 people and parking. We can represent this information in an equation as:

Now we will use elimination method to solve our given system of equations.
Upon subtracting equation (1) from equation (2), we will get:




Therefore, the each ticket costs $65.
Upon substituting
in equation (1), we will get:




Therefore, the parking costs $10.
For this case we have a function of the form:

Where,
A: initial amount
b: growth rate (for b> 1)
x: independent variable
y: dependent variable
We then have the following function:

Using the definition, the following statements are correct:
1) The function is exponential
2) The function increases by a factor of 2.5 for each unit increase in x
3) The domain of the function is all real numbers
So 4:30 and then the second one is 15:75