Answer:

Step-by-step explanation:
Let
x -----> grams of zinc
y ----> grams of copper
we know that
-----> equation A
For y=629 grams of copper
substitute in the equation A and solve for x



We only know the first number to three significant figures so we can approximate the rest as 10 and call the sum 2620.
3√50·√22 = 3√1100 = 3√11·10² = 30√11
√162x³y² = √2·3⁴·x³·y² = 9xy√2x
Answer:
A is the right answer. so right it