Question

The weight of 10 identical samples of a substance is 0.01 pound. what is the weight of 10000 samples?

Answer 1

The answer is 10 pounds.

I set up a proportion of 10 / 0.01 = 10000 / x. 

Cross-multiply to get 10x = 10000(0.01). Simplify to get 10x = 100. Divide by 10 to isolate the variable. 

x = 10. 10000 samples would weigh 10 pounds.