Question

If 4.5 lb is $10 and 13.7 lbs is $50, how much is 9 lb?

A) $20
B) $25
C) $30
D) $35

Answer 1

To find the cost of 9 lb, set up a proportion using the given information. Solve for x to find the cost.

Step-by-step explanation:

To find the cost of 9 lb, we can use the given information about the cost of 4.5 lb and 13.7 lb. We can set up a proportion to solve this problem. Let's set up the proportion:

4.5 lb / $10 = 13.7 lb / $50

Cross-multiplying, we get:

4.5 lb * $50 = 13.7 lb * $10

Simplifying, we have:

$225 = $137

Now, to find the cost of 9 lb, we can set up another proportion:

4.5 lb / $10 = 9 lb / x

Using the proportion, we can solve for x, the cost of 9 lb:

4.5 lb * x = 9 lb * $10

x = $18

Therefore, the cost of 9 lb is $18. The correct answer is not provided in the options, so none of the given options is correct.