Let X be the time or period needed for an automobile center to finish an oil change.
X ∼ N (17, 2.5)
a)
P(X ≥ 20) = P((X - 17)/5 ≥ (20- 17)/2.5) = P(Z ≥ 1.2) = .1151 *100 = 11.51% is the answer
b)
P(X ≥ x) = 0.07
P (X - 17)/2.5 ≥ (x - 17)/2.5) = 0.07
P (Z ≥ z) = 0.07
look at the z table, 0.07 lies between 1.47 and 1.48, add and then divide you'll get:z = 1.475
1.475 = (x - 17)/2.5
x = 20.6875 ≈ 21 minutes
Answer:
Downward sloping
Explanation:
In a market condition of pure monopoly, there is a single firm operating the whole market and managing all the buyers. All the buyers in this market condition are price takers because the price is set by the monopolist.
The pure monopolist faces the downward sloping demand curve which shows the inverse relationship between the price of the good and the quantity demanded and they can obtain the economic profits in the long run because of the restrictions over the entry of the other firms.
Answer:
they somtimes do that to help the site
Explanation:
<span>What group is responsible for stepping in to prevent a bank run is</span>banking regulators like the Fed.
I hope this helps!
