Combined gas law

An example of a combined gas law problem from the Industrial Mechanic (Millwright) Second Period math curriculum. The problem comes from the D2L math practice tests.
If a compressor that has a compression ratio of 8:1, draws in air at sea level at a temperature of 77 degrees Fahrenheit, what would the compressor discharge gauge read if the discharge pressure was 118 PSIG?

[@cck0728]

Excellent video. How to calculate ACFM for a multistage reciprocating compressor (for any given conditions)?

[@saitmillwright804]

Thanks for the feedback. This type of calculation will only solve for the theoretical CFM, not actual CFM. There are always losses due to friction, leakages etc and this calculation does not include things like humidity.