The horizontal distance between two towers is 80 m. the angle of depression of the top of the first tower when seen from the top of the second tower is 30o. if the height of the second tower is 160 m, find the height of the first tower.

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac

What is perpendicular to y=-1/2x+11