Step 1: Libby earns £30 for selling one pet.
Step 2: She sold 8 pets.
Step 3: To find her total earnings we multiply the money for one pet by the number of pets.
So, Amount earned = £30 × 8
Now let’s check the options:
a) £30 + 8 → this is just adding, not correct.
b) £30 × 8 → this is correct, it matches our calculation.
c) £30 + (10 × 8) → this adds an extra 10 × 8, wrong.
d) £30 × (10 + 8) → this means £30 × 18, which is too big and wrong.
Final Answer: Option b, Amount earned = £30 × 8.
We use multiplication because each pet has the same price.
