Pre-Calculus

Have pre-calculus questions? Ask a pre-calculus tutor

Connect one-on-one with {0} who will answer your question

Coal is carried from a...

Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 55 tons of coal into each car. The actual weight of coal loaded into each car are normally distributed with a mean u=55 tons and standard deviation of o=0.6 tona) what is the probability that one car chosen at random will have less than 54.5 tons of coal(round your answer to four decimal placesb) what is the probability that 45cars chosen at random will have a mean load weigh x of less than 54.5 tons of call( rounds your answers to four decimal places

Show More

Show Less

Was this answer helpful?

Describe your issueThe assistant will guide you

Chat 1:1 with a tutorLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related Pre-Calculus Questions

A manufacturer knows that their items have a lengths that

A manufacturer knows that their items have a lengths that are skewed right, with a mean of 13.3 inches, and standard deviation of 1.4 inches.If 38 items are chosen at random, what is the probability t… read more

2 questions In 2017, the average credit score for loans

2 questions In 2017, the average credit score for loans that were purchased by a government-sponsored mortgage loan company was 746. A random sample of 35 mortgages recently purchased by the company… read more

A manufacturer knows that their items have a normally

A manufacturer knows that their items have a normally distributed length, with a mean of 10.8 inches, and standard deviation of 1.4 inches.If 18 items are chosen at random, what is the probability tha… read more

Monitors manufactured by TSI Electronics have life spans

Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a standard deviation of 1400 hours and a mean life span of 12,000 hours. If a monitor is selected at rando… read more

Suppose x has a distribution with a mean of 80 and a

Suppose x has a distribution with a mean of 80 and a standard deviation of 9. Random samples of size n = 36 are drawn. (a) Describe the x bar distribution. x bar has a normal distribution. x bar has a… read more

Find the probability and interpret the results. If

Find the probability and interpret the results. If convenient, use technology to find the probability. The population mean annual salary for environmental compliance specialists is about $60 comma 5… read more

The mean height of women in a country (ages 20minus29) is

The mean height of women in a country (ages 20minus29) is 64.1 inches. A random sample of 60 women in this age group is selected. What is the probability that the mean height for the sample is great… read more

Start of Questions A manufacturer knows that their items

Start of Questions A manufacturer knows that their items have a lengths that are skewed right, with a mean of 15.6 inches, and standard deviation of 4.5 inches.If 49 items are chosen at random, what i… read more

Question 1 of 40 2.5 Points The distribution of .A. degrees

Question 1 of 40 2.5 Points The distribution of B.A. degrees conferred by a local college is listed below, by major. Major Frequency English 2073 Mathematics 2164 Chemistry 318 Physics 856 Liberal Art… read more

I am looking at a set of questions you answered 9 months

Hi Ryan, I am looking at a set of questions you answered 9 months ago. How can I get those answers. ***** ***** … read more

Question 1 Assume that the weight loss first month

Question 1 Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform dis… read more

Question 1 1. Find the indicated probability. A sample space

Question 1 1. Find the indicated probability. A sample space consists of 174 separate events that are equally likely. What is the probability of each? 0 1 174 1/174 Question 2 1. From the information … read more

Question 1 of 40 2.5 Points A die with 12 sides is rolled.

Question 1 of 40 2.5 Points A die with 12 sides is rolled. What is the probability of rolling a number less than 11? Is this the same as rolling a total less than 11 with two six-sided dice? Explain. … read more

Question 1 of 40 2.5 Points Of 1308 people who came into a

Question 1 of 40 2.5 Points Of 1308 people who came into a blood bank to give blood, 314 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will h… read more

Question 1 1. Find the indicated probability. A sample space

Question 1 1. Find the indicated probability. A sample space consists of 174 separate events that are equally likely. What is the probability of each? 0 1 174 1/174 Question 2 1. From the information … read more

There are 25 problems. Problems #1–12 are Multiple Choice. Problems

There are 25 problems. Problems #1–12 are Multiple Choice. Problems #13–15 are Short Answer. (Work not required to be shown) Problems #16–25 are Short Answer with work required to be shown. MULTIPLE C… read more

I need help again with statistics again and ask that you

I need help again with statistics again and ask that you help me with some other examples Identify the sample space of the probability experiment and determine the number of outcomes in the sample spa… read more

What is the mean annual snowfall during 49 randomly picked years?

Solve the problem. The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 94 inches, and a standard deviation of 14 inches. What is the probability that the … read more

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.

JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.

Web sites like justanswer.com/legal

...leave nothing to chance.

...leave nothing to chance.

Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.

Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

Los Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

Hesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

Kernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

Woodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

Elkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

Dallas, TX

< Previous | Next >

Mr. Gregory White

Master's Degree

168 satisfied customers

M.A., M.S. Education / Educational Administration

JACUSTOMER-yrynbdjl-

Master's Degree

13 satisfied customers

I have taught college Mathematics for the past 10 years.

Dr. Arthur Rubin

Doctoral Degree

12 satisfied customers

Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers

judybailey61

Bachelors Degree

11 satisfied customers

20 years teaching and tutoring experience.

Ashleigh T

Educator

2,956 satisfied customers

Highly-Qualified Educator

Scott

MIT Graduate

1,855 satisfied customers

Over 13,000 accepts & 100% feedback in the old math category

Kofi

PhD in Statistics

1,525 satisfied customers

Masters in Mathematics and Statistics

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.