a bicycle is filled with air to a pressure of 6.80atm and a temperature of 19 degrees celsus. Riding the ike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius. The volume of the tire increases by 4.0%. What is the new pressure in the bicycle tire?

Answer 1

Note the correct spelling of celsius.

The easy way to do these is to assume an initial volume, any number that is convenient will do. Then the new volume is 0.04 x that initial volume.
{P1V1/T1) = (P2V2/T2)
Remember T must be in kelvin.