How many permutations of the word ROYAL are there when... a. you take 5 letters at a time?

b. you take 2 letters at a time?

Which polynomial function has x intercepts -1, 0, and 2 and passes through the point (1, -6)

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?