WILL GIVE BRAINLIEST TO THE FIRST PERSON TO ANSWER! PLEASE.. A carpenter cuts a 2" × 4" board to a desired length. He then uses this board as a pattern to cut the second board congruent to the first. Similarly, he uses the second board to cut a third board and the third board to cut a fourth board. Prove that the last board cut has the same measure as the first.

I need help with this fast please.

The weekly amount spent by a company for travel has an approximately normal distribution with mean = $550 and standard deviation = $40. a) what is the probability that the actual weekly expense will exceed $570 for more than 20 weeks during the next year? (note: one year = 52 weeks) b) what is the probability that actual weekly expenses exceed $580 for 10 or more, but 16 or fewer weeks during the next year?