Some people feel that the ideal temperature for an office space is 72.0F. What is the temperature in C?

The formula I used is
F= 9 x 72 + 32 = 648 + 32
Is this correct so far

No. You're way off.

http://www.albireo.ch/temperatureconverter/formula.htm

Celsius= 5/9*(Fahrenheit-32)

Celsius= 5/9*(72-32)

Celsius= 22.22 degrees celsius

To convert Fahrenheit to Celsius, you need to subtract 32 from the Fahrenheit temperature and multiply the result by 5/9. Let's go through the calculation step-by-step:

1. Start with the given temperature in Fahrenheit: 72.0°F
2. Subtract 32 from the Fahrenheit temperature: 72.0°F - 32 = 40.0°F
3. Multiply the result by 5/9: 40.0°F * (5/9) = 22.2°C

So, the temperature in Celsius is 22.2°C. Therefore, the formula you used is not correct.