Answer:
6 goldfish (max)
Step-by-step explanation:
Since we are given the diameter and are looking for a maximum of fish per cubic inch, it means that we are dealing with volume.
Formula for volume of a sphere is: 4/3pi(r^3)
We have the diameter, so to get the radius, simply divide it by 2.
20/2 = 10
r = 10
Plug it in and solve.
4/3pi(10^3) = V
V = 4188.79 cubic inches
Divide the volume by the rate to get your amount.
4188.79/693 = 6.04
round to nearest whole, as you can't have a percentage of a fish (living maybe)
6.04 --> 6