Answer:
(a) -

(b) -

Explanation:
Given the cylindrical fish tank with a diameter of 16 yards and a height of 10 yards. We are asked to answer the following.
(a) - How much water can the tank hold, in other words what is the tank's volume?
(b) - Given that a specific kind of fish requires 2 yd³ of water per fish, find the total amount of fish that can occupy the tank.
Part (a):
Given:

Find:

For part (a) the question is essentially asking what the volume of the tank is, the tank is a cylinder. We can use the following formula to find the volume of a cylinder.

(1) Find the radius of the tank given that the diameter is 10 yards

(2) - Compute the volume of the tank using the formula from above and the value of the radius we just found.

Thus, the volume of the tank is found.
Part (b):
Given:

Find:

To find the total amount of fish that can fit in the tank, simply divide the total volume of the tank by the volume one fish requires.

Thus, the tank can hold 1005 fish.