How can you reduce the exposure to ionizing radiation? a. don't live near a nuclear facility. b. stand at least two inches away from the radiation source. c. spend as little time as possible in a radiation field. d. avoid standing next to a metal doorway.

Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.

Could someone . i have tried to solve myself but my calculation is off

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.