Ineed big time! for anyone who can answer this question!

a company had a competition to see which team could load trucks at the loading dock the fastest. on day one, team one loaded 51⁄2 trucks. the leader of team three said her team could load 31⁄2 times that number when it was their turn to participate. how many trucks does that team expect to load?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.