If a plane is cruising at an altitude of 30,000

feet wants to land at O'Hare, it must begin

its decent so that the angle of depression to

the airport is 7º. How many miles from the

airport must the plane begin to descend?

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

There is a spinner with 14 equal areas, numbered 1 through 14. if the spinner is spun one time, what is the probability that the result is a multiple of 2 or a multiple of 5?