Question

Ralph bought a dozen widgets and it cost $30. How much will 80 widgets cost?

A) $32
B) $220
C) $20
D) $200

Answer 1

To find out how much 80 widgets will cost, we can use the concept of proportionality and set up a proportion between the number of widgets and their cost. The cost of 80 widgets is $200.

Step-by-step explanation:

To find out how much 80 widgets will cost, we can use the concept of proportionality. If Ralph bought a dozen widgets (which is equal to 12 widgets) for $30, we can set up a proportion using the number of widgets and their cost. The proportion would be 12/30 = 80/x, where x is the cost of 80 widgets. Cross-multiplying, we get 12x = 2400. Dividing both sides of the equation by 12, we find that x = 200. Therefore, 80 widgets will cost $200. So the correct answer is D) $200.