Answer:
They eat 2 pounds in one week
Explanation:
Lets write down what we know:
Zeus eats: 1/2
Shiva eats: 1
Apollo eats: Same amount as Zeus, 1/2.
How many do they eat in one week?
In order to answer this question, we just need to add all of our numbers together.

Add the halves together. 1/2 + 1/2 = 1

Add the 1s

They eat 2 pounds in one week