Mathematics

Standby time is amount of time a phone can remain powered on while not being used. A cell phone company claims that the standby time of certain phone model is 16 days on average. A consumer report firm gathered a sample of 19 batteries and conducted tests on this claim. The sample mean was 15 days and 10 hours and the sample standard deviation was 30 hours. Assume that the standby time is distributed as normal. In testing if the average standby time is shorter than 16 days, compute the value of the test statistic (round off to second decimal place).
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The second angle of a triangle is the same size as the first angle. The third angle is 12 degrees larger than the first angle. How large are the angles?
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Question 5: A recent CNN News survey reported that 76% of adults think the U.S. pennies should still be made. Suppose we select a sample of 20 people. How many of the 20 would you expect to indicate that the Treasury should continue making pennies? What is the standard deviation? What is the likelihood that exactly eight people would indicate the Treasury should continue making pennies? What is the likelihood that 10 to 15 adults would indicate the Treasury should continue making pennies?
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Evaluate expression 15/x for x=3
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2. An 82 kg man on a diving board drops from rest 3.0 m above the surface of the waterand he comes to rest 0.55 s after reaching the water. What is the average net force onthe diver as he is brought to rest? Remember to first find the velocity of the man after hefalls 3.0 m off of the diving board.
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It usually took josh 2/5 of an hour to ride his bike to work. But on Monday, his bike was broken, so he took the bus to work which took 5/8 of an hour. How much longer was it to take the bus to work?
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Nine members of the drama club are going to New York to see a broadway play as a group. Total cost for tickets, including a $15.00 handling fee, will be no more than $258.00. What is the maximum cost of each ticket?
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Ben just purchased a new shirt for $27.20 during a 15% off sale what was the original price of the shirt
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What is the product?-84x12-84x2484x1284x24
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A food truck operator has traditionally sold 75 bowls of noodle soup each day. He moves to a new location and after a week sees that he has averaged 85 bowls of noodle soup sales each day. He runs a one-sided hypothesis test to determine if his daily sales at the new location have increased. The p-value of the test is 0.031. How should he interpret the p-value? a. There is a 3.1% chance that the true mean of soup sales at the new location is 85 bowls a day. b. There is a 96.9% chance that the true mean of soup sales at the new location is greater than 75 bowls a day. c. There is a 96.9% chance that the sample mean of soup sales at the new location is 85 bowls a day. d. There is a 3.1% chance of obtaining a sample with a mean of 85 or higher assuming that the true mean sales at the new location is still equal to or less than 75 bowls a day. e. There is a 96.9% chance that the true mean of soup sales at the new location is within 3.1 bowls of 85 bowls a day.
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What is 2x minus negative x
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I need a bit of help with this question.Sorry that the image loaded upside down!
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Estimate the value of the function at x = 4 given the following graph.
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(3)-2Evaluate exponent
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What is the value of x?
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Which numbers are prime numbers?Check all that are true.1929172325none of the above
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Ten more shoes than Rubens
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SAT verbal scores are normally distributed with a mean of 433 and a standard deviation of 90. Use the Empirical Rule to determine what percent of the scores lie between 433 and 523.
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The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes. The probability that she will finish her trip in 80 minutes or less is _____.
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The space capsule is moving up at a speed of 80 miles per hour a few secondsafter launch. What is the space capsule's velocity?
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A very bright student is described as having an IQ that is three standard deviations above the mean. If this student's IQ is reported as a z-score, what would the z-score be?a. z = m + 3b. z = m + 3sc. z = 3d. cannot be determined from the information given
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ALPHA WHERE ARE YOU?An equation is shown below:7(2x 3) = 1Which of the following correctly shows the first two steps to solve this equation? Step 1: 9x 7 = 1; Step 2: 9x = 8 Step 1: 9x + 4 = 1; Step 2: 9x = 3 Step 1: 14x 3 = 1; Step 2: 14x = 4 Step 1: 14x 21 = 1; Step 2: 14x = 22
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What are the roots of the polynomial equation x cubed minus 10 x = negative 3 x squared + 24? Use a graphing calculator and a system of equations.24, 3, 1212, 3, 244, 2, 33, 2, 4
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what is 298.8 subtracted by 4.09
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