Tyler is building a fish tank in the shape of a sphere that has a diameter of 20 inches. Based on Tyler's research, it is recommended to have no more than 1 goldfish for every 693 cubic inches of water. How many goldfish should Tyler buy for his fish tank?

Answer: 6 fishes

Step-by-step explanation:

Hi, to answer this question we have to apply the next formula:

Volume of a sphere = 4/3 x π x (diameter/2) ^3

Replacing with the values given:

V = 4/3 x π x (20/2) ^3

v = 4/3 x π x (10) ^3 = 4,188.79 in3

Finally, we have to divide the volume of the fish tank by the volume that each goldfish needs.

4,188-79 / 693 = 6.04 = 6 fishes

Feel free to ask for more if needed or if you did not understand something.

What about 18 inches in diameters?

Step-by-step explanation:

My question that i recently have is 18 inches instead of 20 and I don't completely understand how you solved that problem like I tried going along with it but I was thing maybe because you used 20 inches in diameters you divide 10 from 2 because its half of 20 so I tried 9 but I still don't really understand the whole thing.