Need a hint: ) lim x-> a: (ln x - ln a) / (x - a)

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.

What is the circumference of a circle with an area of 50.24 cm²?

I’m really confused and need to learn this