Farley bought $5 worth of school supplies plus pencils at $0.40 per pencil. what is the rate of change in this sentence?

Anyone know? will mark brainliest if you're correct!

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?