Question

heather is a cashier. she can ring up 12 customers in 9 minutes. at this rate, how many minutes does it take her to ring up 4 customers?
□ minutes

Explanation:

Step1: Find rate per customer

First, find the time per customer. Heather rings 12 customers in 9 minutes, so time per customer is $\frac{9}{12}$ minutes. Simplify $\frac{9}{12}=\frac{3}{4}$ minutes per customer.

Step2: Calculate time for 4 customers

Multiply time per customer by 4: $4\times\frac{3}{4} = 3$ minutes.

Answer:

3