A toy balloon if filled with 0.150 grams of hellium and ocupied a valume of 4250.0 Cm3. It rises 2500 miters above the street where temperature is 23 degrees F. Calculate the pressure that the hellium exert inside the balloon at this altitud. Please anyone who can help me. I thing I have to use the pressure formula or the combine formula. Not sure.. Anyone please I have to turn in my take home test today at 10:00 am.