From 1970 to 1990, the consumer price index (cpi) increased from 38.8 to
130.7. if a jar of grape jelly cost $0.25 in 1970 and the price of grape jelly
increased at the same rate as the cpi from 1970 to 1990, approximately how
much did a jar of grape jelly cost in 1990?

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.