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Problem Page Lashonda drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 10 hours. When Lashonda drove home, there was no traffic and the trip only took hours. If her average rate was miles per hour faster on the trip home, how far away does Lashonda live from the mountains?
General
2 months ago
A study of the US clinical population found that 24.5% are diagnosed with a mental disorder, 14% are diagnosed with an alcohol-related disorder, and 4% are diagnosed with both disorders. (a) What is the probability that someone from the clinical population is diagnosed with a mental disorder, knowing that the person is diagnosed with an alcohol-related disorder? Please use 3 decimal places. (b) What is the probability that someone from the clinical population is diagnosed with an alcohol-related disorder, knowing that the person is diagnosed with a mental disorder? Please use 3 decimal places.
General
2 months ago
In a test of Murphy’s law, pieces of toast were buttered on one side and then dropped. Mur- phy’s law predicts that they will land butter-side down. Out of 9821 slices of toast dropped, 6101 landed butter-side down. (Believe it or not, these are real data!10) a. What is a 95% confidence interval for the probability of a piece of toast landing butter- side down? b. Using the results of part (a), is it plausible that there is a 50:50 chance of the toast land- ing butter-side down or butter-side up?
General
2 months ago
Two cars simultaneously left Points A and B and headed towards each other, and met after 3 hours and 15 minutes. The distance between points A and B is 364 miles. What is the speeds of the cars, if one of the cars travels 12 mph faster than the other?
General
2 months ago
The level of lead in the blood was determined for a sample of 152 male hazardous-waste workers age 20-30 and also for a sample of 86 female workers, resulting in a mean ± standard error of 5.4 ± 0.3 for the men and 3.1 ± 0.2 for the women. Calculate an estimate of the difference between true average blood lead levels for male and female workers in a way that provides information about reliability and precision. (Use a 95% confidence interval. Round your answers to two decimal places.)
General
2 months ago
A company selling licenses of new e-commerce software advertised that firms using this software could obtain, on average during the first year, a minimum yield (in cost savings) of 20 percent on average on their software investment. To disprove the claim, we checked with 10 different firms which used the software. These firms reported the following cost-saving yields (in percent) during the first year of their operations: {17.0, 19.2, 21.5, 18.6, 22.1, 14.9, 18.4, 20.1, 19.4, 18.9}. a. Do we have significant evidence to show that the software company’s claim of a minimum of 20 percent in cost savings was not valid? Test using α = 0.05. b. Compute a 95% confidence interval for the average cost-saving yield estimate.
General
2 months ago
In an average year, the American chemical industry produces more than 9.5 million metric tons of sodium carbonate. Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals. How many pounds of sodium carbonate are produced annually?
General
2 months ago
The equation y 16t 2 18t 405 describes the height in feet of a ball thrown downward at 18 feet per second from a height of 405 feet from the ground as a function of time t in seconds In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest tenth?
General
2 months ago
A sandwich shop offers 2 types of bread, 4 types of meat, and 3 types of cheese. How many different types of sandwiches can be made using 1 type of bread, 1 type of meat, and 1 type of cheese?PLZ HELP!FIRST TO ANSWER GETS BRAINLIEST!ALL ANSWERS WILL GET A THANKS AND 5 STAR RATING NO MATTER WHAT!!
General
2 months ago
The U.S. Census Bureau announced that the median sales price in 2014 for new homes was $282,800 and the mean sales price was $345,800. The standard deviation was $90,000. a. If you selected a random sample of 100 homes sold, what is the probability that the sample mean would be less than $370,000? b. If you selected a random sample of 100 homes sold, what is the probability that the sample mean would be between $350,000 and $360,000?
General
2 months ago
Jacob’s class had 8 boys and 10 girls. Olivia’s class has 9 boys and 15 girls. Which class has the smaller ratio of boy/girls?
General
2 months ago
in a study about the relationship between marital status and job level, 8235 males at a large manufacturing firm reported their job grade (from 1 to 4, with 4 being the highest) and their marital status. This to a table shows the results. according to the table, there are 955 employees in total with the lowest job grade. This number is an example of a ?thanks!!
General
2 months ago
Answer this question
General
2 months ago
Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students is absent. How many students are there in our class? How many students are not here today?
General
2 months ago
Two planes are orthogonal if their normal vectors are orthogonal. Find the equation of a plane that is orthogonal to the plane 3x − y + 2z = 1 and that contains the points (1, 1, 2) and (2, 2, 1).
General
2 months ago
a) 1b) 5c) -1/2d) sqrt. 3not multiple choice, those are all the problems I need answeredthanks
General
2 months ago
Jefferson School has 1120 students. The teacher-pupil ratio is 1 : 35. a. How many additional teachers will have to be hired to reduce the ratio to 1 : 20? teachers b. If the teacher-pupil ratio remains at 1 : 35 and if the cost to the district for one teacher is $33000 per year, how much will be spent per pupil per year? $ (round to two decimal places) c. Answer part (b) for a ratio of 1 : 20.
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2 months ago
The student government paid a company $225.00 to rent speakers for the school dance. They also paid the same company $300.00 to rent a disc jockey for 3 hours. If the student government paid a 5% sales tax on the rental speakers and paid an 18% gratuity to the DJ, how much did the student government pay in total for the school dance?
General
2 months ago
Marcia has two credit cards and would like to consolidate the two balances into one balance on the card with usrate. The table below shows the information about the two credit cards Marcia currently uses.TAmountAPRMonthly PaymentCard A$1,879.5814%$43.73Card B$861.0010%$18.29After 5 years, how much will Marcia have saved in interest by consolidating the two balances?a $1,526.40b. $2,422.80C. $105.00d. $227.40Please select the best answer from the choices provided.Mark this and returnSave and ExitNextSubmit
General
2 months ago
Anson estimated he would need 17 hours to complete his science project. He actually needed 19 1/2 hours. What was his percent error?
General
2 months ago
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