The original selling price of a share of stock was d dollars. The selling price for a share of the same stock at a later date was represented by the expression 1.8(0.45d).
Which description could explain what happened to the price of the share of stock?

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18