Aaliyah went to the 2016 Summer Olympics and watched the US women’s volleyball match against Brazil. 70% of the serves from Brazil were out of bounds. Aaliyah saw 30 serves from Brazil. How many serves from Brazil were out of bounds?

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