Here u go guys please I need help asap

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?

Can someone me i’m confused. will give brainliest and a whole bunch of points

Which of the following vectors are orthogonal to (2,1)? check all that apply