If one bottle of soda costs $0.99, how much does three cost? how much will they cost with 5% tax?

Three bottles would cost $2.97.

With tax:

1.05(2.97) = 3.1185 (around 3.12)

The bottles would cost around $3.12 with tax

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2