Jose has won the lottery. He spends 4/5 on a house. He spends 3/4 on a sports car. He spends 2/3 on a trip. He gives his remaining 50,000 to charity. How much money did jose win in the lottery?? Show work

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.

Having a hard time understanding this question (see attachment).

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)