Mathematics, 11.01.2021 15:30 angelalovelis
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. A preliminary sample conducted by The Wall Street Journal showed that the standard deviation of the amount of time devoted to previews was five 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 78 seconds, what sample size should be used
Answers: 1
Mathematics, 21.06.2019 15:10
Aboat's value over time is given as the function f(x) and graphed below. use a(x) = 400(b)x + 0 as the parent function. which graph shows the boat's value increasing at a rate of 25% per year?
Answers: 3
Mathematics, 21.06.2019 18:00
The ratio of wooden bats to metal bats in the baseball coachβs bag is 2 to 1. if there are 20 wooden bats, how many metal bats are in the bag?
Answers: 1
Mathematics, 21.06.2019 19:00
Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be bale to prepare using the sauce?
Answers: 3
Mathematics, 21.06.2019 19:30
Factor the following expression. 27y3 β 343 a. (3y + 7)(9y2 + 2ly + 49) b. (3y β 7)(9y2 + 2ly + 49) c. (3y β 7)(932 β 217 + 49) d. (3y + 7)(92 β 2ly + 49)
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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