Lana bought 4 pounds of chocolate at the candy store if each pound of chocolate cost 3.65 and she paid with a twenty dollar bill how much change should she get back

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Atransformation t : (x,y) (x-5,y +3) the image of a(2,-1) is