A ticket to a movie cost t dollar and there is a 15% tax on each ticket

To calculate the total cost of a movie ticket with a 15% tax, you need to add the tax amount to the ticket price.

Let's assume the ticket price is t dollars.

The tax amount is calculated by multiplying the ticket price by the tax rate (15% or 0.15):

Tax = t * 0.15

To find the total cost, you add the ticket price and the tax amount:

Total Cost = Ticket Price + Tax
Total Cost = t + Tax
Total Cost = t + (t * 0.15)
Total Cost = t * (1 + 0.15)
Total Cost = t * 1.15

So, the total cost of a movie ticket with a 15% tax is t * 1.15 dollars.