a. To find the total cost of a movie ticket including the amusement tax, we need to calculate the tax as a percentage of the ticket price. The amusement tax is 15% of the ticket price \( t \).
The tax can be expressed as: \[ \text{Tax} = 0.15t \]
The total cost is then the sum of the original ticket price and the tax: \[ \text{Total Cost} = t + 0.15t \] We can also factor this expression as: \[ \text{Total Cost} = 1t + 0.15t = 1.15t \]
Thus, we have two expressions showing Conor's total cost:
- \( t + 0.15t \)
- \( 1.15t \)
b. If the price of a movie ticket is \( t = 12.49 \), we can use one of the expressions to find Conor’s total cost. We will use the expression \( 1.15t \):
\[ \text{Total Cost} = 1.15 \times 12.49 \]
Now, we calculate it: \[ 1.15 \times 12.49 = 14.2885 \]
Rounding to the nearest penny, Conor's total cost is: \[ \text{Total Cost} \approx 14.29 \]
Thus, Conor’s total cost, rounded to the nearest penny, is $14.29.