Simplify to a single power of 2

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

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.

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl