According to the American Time Use Survey, Americans sleep an average of 7.82 hours each day with a standard deviation of 2.75 hours. Let be the average of a random sample of Americans. What sample size will give the standard deviation of equal to 0.21 hours? Round the solution up to the nearest whole number, if necessary. n =

Q: 2/5+4/8

A: We have to find the sum

Q: Let Mbe as in Equation (3.14) and let X = [1, 0, ½]¹. Show that the entries of Y=MX sum to 1.

A:

Q: -8 - 12

A: Given problem is

Q: 3/8+5/24

A: The given expression is 3/8 + 5/24.Simplify the given expression as follows.

Q: 4 1/2 + 3 2/3=

A: Given,

Q: 11 35

A:

Q: 2/5 +7/12

A: Please see the answer below.

Q: 3 3/4 + 2 7/28

A:

Q: nvert

A:

Q: -5 4 -2 -7 -8 2.

A:

Q: the series

A:

Q: k 24

A: First we solve the inequality. ANd for that , we divide both sides by -6 .And on dividing by…