Nathan usually drinks 36 ounces of water per day. he reads that he should drink 64 ounces per day. if he starts drinking 64 ounces, what is the percent increase?

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