Find the 80% confidence intervals for the variance and standard deviation of the ages of seniors at Oak Park College if a random sample of 30 students has a standard deviation of 2.8 years. Assume the variable is normally distributed.
Use the chi-square distribution table to find any chi-square values to three decimal places. Round the final answers to one decimal
place.

The coordinate grid shows points a through k. which points are solutions to the system of inequalities listed below? 2x+ ys 10 2x 4y < 8 oa c, d, k o e, f. g, j oa, c, d, h, k oe, f. g, h, j

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.

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?