Do y’all know what these symbols are called ??

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.

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

Hurry which expression is equivalent to 3√x^5y?