URGENT Find Surface Area of triangular shown.
(If you can please explain, thank you!!)

A) 264
B) 300
C) 240
D) 272

Joseph haydn pet store offers wide variety of leashes for dogs. the store purchases one popular type of leash from its manufacturer for $4.38 each. joseph haydn pets marks up leashes at a rate of 238% of cost. what is the retail price of the popular leash?

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.