Use the given information to find the number of degrees of freedom, the critical values chi subscript upper l superscript 2 and chi subscript upper r superscript 2, and the confidence interval estimate of sigma. it is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. nicotine in menthol cigarettes 98% confidence; n equals 25, s equals 0.27 mg.

my answer is$ 12

step-by-step explanation:

because 15 -2=12

i got 10.28 but that rounds up to 10.3

a.) list the factors of 40.

1/2/4/5/8/10/20/40

b.) list the factors of 40 that represent the number of cans that could be on each shelf.

5

c.) how many different arrangements of cans are possible?

just one because if you put more on one shelf you will go way over 40 and the cabinet will probably break.

d.) what are the possible arrangements of the cans?

put 5 cans on each self to reach 40 cans in total.

e.) which arrangement uses all the shelves?

5 because you can put 5 cans on each shelf, and since there are 8 shelfs you are equally going to get 40 cans.