I'm confused on something relatively silly.

This math problem is as follows:

"Fast-food stands cost $6.50. The price has steadily increased 4% per year for many years.

Question 1: What will it cost in 10 years?

solution: $6.50 is the initial value and the multiplier is 1.04."

I'm only confused on the multiplier. How did they get 1.04?

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

An equation where variables are used to represent known values—function notation true or false

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =