Question

Brianna can buy 14 pencils for $1.50 at the school store. At that rate, about how much would 100 pencils cost?

Answer 1

Explanation:

We can use the rule of threes

Let's solve the following equation we get from the rule of threes

`(14)/(1.50) = (100)/(x)\\\\x = (100)/(14)\cdot (1)/(1.50)\\\\x = 4.7619\\`

Therefore, 100 pencils would cost $4.7619 ≈ $4.8