Asubtending arc on a circle with a radius of 4.5 centimeters has a arc length of 8 pie. the measure of the angel subtended by the arc is?

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Adaylily farm sells a portion of their daylilies and allows a portion to grow and divide. the recursive formula an=1.5(an-1)-100 represents the number of daylilies, a, after n years. after the fifth year, the farmers estimate they have 2225 daylilies. how many daylilies were on the farm after the first year?

I'm confused on this could anyone me and show me what i need to do to solve it.