A library bookshelf has 6 shelves. Nine books can fit on each shelf. How many books can the bookshelf hold?

Anyone know? will mark brainliest if correct

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

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?