Ali decided to paint the stones with a thin coat of gold. There is 0.0004 g of gold in each of the unique stones. What is the total quantity of gold (in mg) used? 0.0004 g (Hint: 1 gram = 103 milligrams) Total quantity of gold Number of unique stones x 0.0004 g = %3D mg In the remaining stones, a total of 0.5 g of silver is used to paint them. What is the quantity of silver added to each stone? (Hint: Remaining stones = 40 - Number of unique stones) Approximate your answer to the nearest 0.01. Quantity of silver in each stone = x 10 g (in scientific notation)

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