Answer:
$0.036
Explanation:
I will be solving this questions in a rational, proportional way.
This question given is directly proportional. There are two types of proportion.
Direct - Let's say there are two values, x and y. In direct proportion, while x increases, y increases with it.
Inverse- Taking x and y, in inverse proportion, while x increases, y decreases or while y increases, x decreases.
In the given example, there are two values, number of plates and cost of plates. While the number of plates increases, the cost would surely increase. Therefore, giving us that it is a direct proportion.
500 plates : $18.00 :: 1 : $x
500 plates is to 18 dollars, then, 1 plate is to how many dollars?
In direct proportion, the product of extremes is equal to the product of means.
500(x) = 18(1)
500x = 18
x = 18 / 500
x = 0.036
Hence, one plate costs $0.036 or 3.6 cents