A weather balloon holds 2,600 cubic meters of helium. The density of helium is 0.1755 kilograms per cubic meter. How many kilograms of helium does the balloon contain? Please round your answer to the nearest whole number. Only enter a numerical value in the answer blank.

Question

perl · Answer

the definition of density is 
density = mass / volume.

you can multiply both sides of this equation to get
density * volume = mass

we know the density of helium and we are given the volume, so we can multiply to get the mass