HELP ME PLEASE! :(
A hummingbird's eyeball has a diameter of about 0.6 cm. A human eyeball has a diameter of approximately 2.5 cm. How many times as great is the volume of a human eyeball as the volume of a hummingbird's eyeball

Question

HELP ME PLEASE! :(
A hummingbird's eyeball has a diameter of about 0.6 cm. A human eyeball has a diameter of approximately 2.5 cm. How many times as great is the volume of a human eyeball as the volume of a hummingbird's eyeball

anonymous · Answer

volume of a sphere
$$V= \frac{4}{3} \pi r^3$$

mertsj · Answer

Find the ratio of the radius of the human eyeball to the hummingbird eyeball and cube it.  That will be the ratio of the volumes.  Divide the top by the bottom.  That will give you how many times bigger the human eyeball is.

anonymous · Answer

how do you find the ratio of the radius
?

anonymous · Answer

and i tried that formula, but the answer didn't match the options that it was giving..

mertsj · Answer

What is the radius of the human eyeball?

anonymous · Answer

0.6?

mertsj · Answer

Read the problem carefully.  Note that radius = 1/2 diameter