Can you please explain number 9 on page 49 in the translating between words and math section? Thank you

Sure. Here’s the question for everyone else following along:

We know that when m = 0, the number of accounts was 4,523.

We also know that 5 years later, there were exactly 41,783 accounts. There are 12 months in a year, so that means m = 60 (). We can use that to plug in 41,783 for , 60 for m, and solve for k.

Does that help?