A high-pressure system is moving into an area. Which type of weather can people in this area expect?

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?