https://lrnx. k12.com/lrnx-ui/student/plan/index? keyCode=B9N909N9I9297-I97-9-H9W-893 -F99-W-09D9H9F9N9I989N9L-U9J-297-L- J-K-V-29M9N9H9M9&studentId=5835 6077890&selectedTab=daily# can you please help i will mark u brainliest and giv u 900 points

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?