Final answer:
To find out how much money Marco received, set up a proportion using the given ratio. Divide Justin's amount by the ratio and simplify to find Marco's amount. Round the result to the nearest dollar.
Step-by-step explanation:
To find out how much money Marco received, we can set up a proportion using the given ratio. Since the ratio is 3:4, we can set up the equation 3x = 4(16), where x represents the amount of money Marco received. Simplifying this equation, we get 3x = 64. Dividing both sides by 3, we find that x = 64/3 = 21.33. However, since money is usually given in whole numbers, we can round down to the nearest dollar. Therefore, Marco received $21. Answering the question options, none of the given choices match the correct amount, so the answer is None of the Above.