Mathematics, 16.10.2019 17:20 Yvette538
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through several previews and prepreview ads before the movie starts. many complain that the time devoted to previews is too long (the wall street journal, october 12, 2012). a preliminary sample conducted by the wall street journal showed that the standard deviation of the amount of time devoted to previews was four minutes. use that as a planning value for the standard deviation in answering the following questions. a. if we want to estimate the population mean time for previews at movie theaters with a margin of error of 75 seconds, what sample size should be used? assume 95% confidence.
Answers: 3
Mathematics, 21.06.2019 20:40
If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32
Answers: 1
Mathematics, 21.06.2019 22:00
Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square
Answers: 1
Mathematics, 21.06.2019 23:00
Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.
Answers: 1
Customers arrive at a movie theater at the advertised movie time only to find that they have to sit...
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