A hot air balloon holds 4,328 cubic meters of helium. The density of helium is 0.1785 kilograms per cubic meter. How many kilograms of helium does the balloon contain, rounded to the nearest tenth of a kilogram?

3,747.9 kg

3,875.3 kg

772.5 kg

4,383.2 kg

Question

A hot air balloon holds 4,328 cubic meters of helium. The density of helium is 0.1785 kilograms per cubic meter. How many kilograms of helium does the balloon contain, rounded to the nearest tenth of a kilogram?

 3,747.9 kg

 3,875.3 kg

 772.5 kg

 4,383.2 kg

anonymous · Answer

Would you do 4328 * 0.1785 = 772.5?

anonymous · Answer

@Loser66

anonymous · Answer

@IMStuck

anonymous · Answer

I don't know any other way to do it besides that

loser66 · Answer

yes, you are correct mass = density* volume

anonymous · Answer

Thanks, could you help me on 2 others?

anonymous · Answer

Snowy's Snow Cones has a special bubble gum snow cone on sale. The cone is a regular snow cone that has a spherical piece of bubble gum nested at the bottom of the cone. The radius of the snow cone is 2 inches, and the height of the cone is 3 inches. If the diameter of the bubble gum is 0.5 inches, what is the closest approximation of the volume of the cone that can be filled with flavored ice? Use 3.14 for pi.

 22.97 cubic inches

 12.50 cubic inches

 13.24 cubic inches

 12.60 cubic inches

anonymous · Answer

Do we need to figure out the volume of the snow cone first? if so, it's 18.85

loser66 · Answer

|dw:1401152369155:dw| I think you have to find out the volume of the bubble gum, then take difference to get the required volume.

anonymous · Answer

I don't get how you find out the volume of the bubble gum with only 1 number to use though

anonymous · Answer

Or do u use 0.5 and 3? this question is confusing for me

loser66 · Answer

yes, we have formula for the sphere radius 0.25 inch
which is 4/3 pir^3

anonymous · Answer

ok that makes sense

loser66 · Answer

I messed it up , instead of 0.25^3 , I calculated 0.25^2 :) you correct it, ok?

anonymous · Answer

Ok so i get what youre doing but i don't understand how to do the math to get the answer

loser66 · Answer

what course are you in? cal2? cal3?

anonymous · Answer

geometry lol

loser66 · Answer

do you know calculus?

anonymous · Answer

no, i haven't even taken the class yet lol

loser66 · Answer

|dw:1401153210265:dw|

loser66 · Answer

|dw:1401153355890:dw|

anonymous · Answer

Yes

loser66 · Answer

so, that's why I ask you whether you know calculus or not. if you don't know, I don't know how to use pure geometry to explain this problem. let me think more

loser66 · Answer

oh, I got it, wait, I draw it out

anonymous · Answer

i've only take algebra 1 honors and geometry honors so far. so this is a calculus question? and ok

loser66 · Answer

so, we can find out how high the bottom to the center of the bubble is, right?

anonymous · Answer

sounds right

loser66 · Answer

oh, let redo |dw:1401153893020:dw|