How can I create equivalent expressions using the distributive property

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

What is the definition of exponential decay?

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?