5. Two trains start from the same station and run in opposite directions. One runs at an average rate of 40
miles per hour, and the other at 65 miles per hour. In
how many hours will they be 315 miles apart?

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.