An aircraft flies at an altitude of 30,000 feet. Determine the air temperature (in [K]), air pressure (in [Pa]) and air density (in [kg/m3]) at this altitude, according to the standard atmosphere.

Answer 1

Check if you are using these formulas for pressure and temperature. If so, go ahead and feed your calcxulator. If not, please post formulas you use.
https://en.wikipedia.org/wiki/Barometric_formula

You may post your answers for checking if you wish, but specify formulas you were using.

Answer 2

45 degree Celsius

Answer 3

So stuck on this question....

Answer 4

T = 228.714
P = 30199.04
density = 0.4643