Helium is used for balloons because it is less dense than air. this is what allows helium balloons to rise. suppose a helium- air mixture in a spherical balloon with a diameter of 1 foot has a density of 0.04 pounds per cubic foot. what is the weight of the gas mixture in the balloon?

a. about 0.02 pounds
b. about 0.03 pounds
c. about 0.04 pounds
d. about 0.52 pounds

Option A

About 0.02 pounds

Step-by-step explanation:

We know that density is defined as:

Where

d is the density

m is the mass

v is the volume

We want to calculate the helium-air mass of a spherical balloon and we know its density and the diameter of the balloon.

Then we can calculate its mass.

1) We use the diameter of the spherical globe to calculate its volume.

The volume of a sphere is:

and

So

2) Use the density formula to find the mass

The answer is 0.02 pounds

how many players are there?

step-by-step explanation:

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.