10.5 trig and area help wit the answer please ASAP

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

A, b, c, and d have the coordinates (-8, 1), (-2, 4), (-3, -1), and (-6, 5), respectively. which sentence about the points is true? a. a, b, c, and d lie on the same line. b. and are perpendicular lines. c. and are parallel lines. d. and are intersecting lines but are not perpendicular. e. and are parallel lines.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m