Peter bought a computer which cost $2499.in addition he had to pay a 10% sales tax on it. How much did peter pay altogether for the computer

To find the total amount Peter paid for the computer, we need to calculate the sales tax he paid and add it to the original cost of the computer.

The sales tax is calculated by multiplying the cost of the computer by the tax rate (10% or 0.10).
Sales tax = $2499 * 0.10 = $249.90

The total amount Peter paid for the computer is the cost of the computer plus the sales tax.
Total amount = $2499 + $249.90 = $2748.90

Therefore, Peter paid $2748.90 altogether for the computer.