Students taking a midterm exam had a mean score of 68, with a standard devia- tion of 6.2. Assume that the scores are normally distributed. Unusual events are any values outside of two standard deviations from the mean.
(1) Find the probability that a student had a score lower than 61.8. Is this an
unusual event? Explain.

(2) Find the probability that a student had a score between 55.6 and 68. Is this
an unusual event? Explain.

Jessica and martha each have a bag of cookies with unequal quantities. they have 30 cookies total between the two of them. each of them ate 6 cookies from their bag. the product of the number of cookies left in each bag is not more than 80. how many more cookies will jessica have martha? if x represents the number of cookies jessica started with, complete the statements below.the inequality that describes the relationship between the number of cookies each one of them has is x^2 - x +224 > = 0.jessica has at least cookies more than martha.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Can someone me with the property questions for 12 13 and 14 plz