Show that lim(1/(n+1)+1/(n+3)...+1/2^n=ln2

Adeli charges the same price, $5.50, for all of its different sandwiches. if a company ordered n sandwiches for a luncheon, which equation could be used to find the total price, p, that the deli charged for the sandwiches? a- n/5.50=p b-5.50n=p c-5.50/n=p d-5.50+n=p

Pls! does anybody know a shortcut for answering these types of questions in the future?

Klmn and pqrs are similar trapezoids. which side of pqrs corresponds to lm