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Problem 15-7 (Algorithmic) Speedy Oil provides a single-server automobile oil change and lubrication service. Customers provide an arrival rate of 4 cars per hour. The service rate is 5 cars per hour. Assume that arrivals follow a Poisson probability distribution and that service times follow an exponential probability distribution. What is the average number of cars in the system? If required, round your answer to two decimal places
General
4 months ago
100 points Will mark the brainliest! Which graph represents the piecewise function?y={x+1 if x≤03x if x>0
General
4 months ago
6 jam jars of volume 0.37 m3 are filled with jam. An empty jam jar has a weight 200g each. the weight of all 6 jars filled with jam is 5400g. Calculate the density of jam using this information.
General
4 months ago
Lisa brought half of her savings to the bakery and bought 12 croissants for $14.20. The amount of money she brings home with her is more than $2.00. Use an inequality to find how much money she had in her savings before going to the bakery.
General
4 months ago
Bag A contains red, white and blue marbles such that the red to white marble ratio is 1:3 and the white to blue marble ratio is 2:3. Bag B contains red and white marbles in the ratio of 1:4. Together, the two bags contain 30 white marbles. How many red marbles could be in bag A?
General
4 months ago
A researcher records the following time spent sleeping per night (in hours) in a group of participants: 5.8 ± 1.8 (M ± SD). The researcher decides to categorize participants who sleep between 6 and 8 hr as moderate sleepers. What percentage of participants fell in this category?
General
4 months ago
Luke is covering a box in chalk paint. If the box is 25 inches long, 13 inches wide, and 18 inches tall, what is the surface area of the box to be covered?
General
4 months ago
The table shows sets of ordered pairs that form a relation. Does each set of ordered pairs represent a function? Select Function or Not a Function for each set of ordered pairs. Set of ordered pairs Function Not a Function {(1,7),(−1,7),(8,−6),(−3,2)} {(4,7),(−1,2),(4,−6),(−3,−2)} {(3,7),(−1,2),(−4,−2),(−3,−2)} {(−3,7),(1,2),(4,−2),(12,−4)}
General
4 months ago
Mark wants to know how many families in his neighborhood plan to attend the neighborhood party. He puts all 80 of the neighborhood addresses in a hat and draws a random sample of 20 addresses. He then asks those families if they plan to attend the party. He finds that 20% of the families plan to attend the party. He claims that 20% of the neighborhood families would be expected to attend the party. Is this a valid inference?A. No, this is not a valid inference because he asked only 20 familiesB. No, this is not a valid inference because he did not take a random sample of the neighborhoodC. Yes, this is a valid inference because he took a random sample of the neighborhoodD. Yes, this is a valid inference because the 20 families speak for the whole neighborhood
General
4 months ago
Write the equation for a parabola that has a vertex (2, -1) and a directrix of x = 5.
General
4 months ago
16)- In Miller county, the voting in annual elections have gone down by a consistent percentage each year and can be modeled bythe function y = 5,700(0.94) What does the value 0.94 represent in the function?The decay factor of voters.The initial number of voters.The number of time intervals.The number of voters after t years.
General
4 months ago
In Miller county, the voting in annual elections have gone down by a consistent percentage each year and can be modeled bythe function y = 5,700(0.94) What does the value 0.94 represent in the function?The decay factor of voters.The initial number of voters.The number of time intervals.The number of voters after t years,
General
4 months ago
n a trip, a motorist drove 150 miles in the morning and 50 miles in the afternoon. His average rate in the morning was twice his average rate in the afternoon. He spent 5 hours driving. Find his average rate on each part of the trip.
General
4 months ago
A baseball is thrown in a parabolic arc. Help?
General
4 months ago
Seven points are marked on the circumference of a circle. How many different chords can be drawn by connecting two of these seven points?
General
4 months ago
Seven previously untrained males performed leg-strength training 3 days per week for 8 weeks (with four sets of five replications at 85% of one repetition maximum). Peak power during incremental cycling increased to a mean of 315 watts with a standard deviation of 16 watts. Construct a 95% confidence interval for the mean peak power after training.
General
4 months ago
"What is the probability that in 10 dice throws, you will throw AT LEAST two ‘3’s on the dice? Assume you’re throwing a single die each time."
General
4 months ago
A university claims its recent graduates earn an average annual salary of $50,000. You draw a random sample of 30 recent graduates and find that their average salary is $47,000, with a standard deviation of $5,000. What is the estimate of the standard error of the mean for this data?
General
4 months ago
ABC Company has made a claim that, on average, their diet soda has less than one calorie. A consumer testing service examined nine cans, and the amount of calories recorded were 0.90, 0.95, 1.00, 1.05, 0.85, 1.00, 0.95, 0.95 and 0.90. Assume the underlying population is approximately normal. a. What are the sample mean and sample standard deviation, respectively?b. Let μ denote the true mean calories of all diet sodas produced by ABC Company. What hypothesis should be tested in order to show if ABC’s claim is valid?c. The appropriate statistic to test this hypothesis is ______d. The value of the test statistic is ______e. The appropriate number of degrees of freedom for this test statistic is ______f. What conclusion can be made with 95% confidence?
General
4 months ago
Which of the following is an equation for the line that passes through the point (0,0) and is perpendicular to the line shown above ?
General
4 months ago
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