Help please this is due in a few minutes!!

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

If (x + 8) is a factor of f(x), which of the following must be true? both x = –8 and x = 8 are roots of f(x). neither x = –8 nor x = 8 is a root of f(x). f(–8) = 0 f(8) = 0