subject

Mathematics, 03.12.2019 01:31 Rakeem458

Andrea and ashley are middle-distance runners for their school’s track team. andrea’s times in the 400-meter race are approximately normally distributed with a mean of 62 seconds and a standard deviation of 0.8 seconds. ashley’s times are approximately normally distributed with a mean of 62.8 seconds and a standard deviation of 1 second.

a) the school record for the 400-meter is 60.0 seconds. what is the probability that andrea breaks the record in her next race?
b) assuming that andrea and ashley’s times in any race are independent, what is the probability that ashley beats andrea in their next race?

ansver

Answers: 1

Show answers

Another question on Mathematics

question

Mathematics, 21.06.2019 15:30

Diane owes $387 to her brother. if she debits her bank account $161.25 a month to pay him back, how many months will it take her to pay off the debt?

Answers: 2

question

Mathematics, 21.06.2019 19:00

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Answers: 1

question

Mathematics, 21.06.2019 19:00

Draw a scaled copy of the circle using a scale factor of 2

Answers: 1

question

Mathematics, 21.06.2019 23:20

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .

Answers: 2

You know the right answer?

Andrea and ashley are middle-distance runners for their school’s track team. andrea’s times in the 4...

Questions

question

Biology, 03.03.2020 02:38

I believe the answer is "A". Please correct me. Which statement best describes the role of animals in the water and carbon cycles?

question

Chemistry, 03.03.2020 02:39

Estimate the total change in entropy of two containers of water using the actual temperatures to determine the heat transferred to each container and...

question

Biology, 03.03.2020 02:39

What condition is a major contributor to disability and placement in nursing homes for those over age 75 and is often accompanied by food intake chang...

question

Business, 03.03.2020 02:39

The price of a stock is $38 at the beginning of the year and $41 at the end of the year. If the stock paid a $2.50 dividend, what is the holding-perio...

question

Biology, 03.03.2020 02:39

When an infant gains familiarity with repeated exposure to a stimulus and their interest begins to lessen, that is because they are experiencing decre...

question

Social Studies, 03.03.2020 02:39

According to the , clients will be more likely to change if they have a positive attitude about change, feel it's enjoyable and controllable, and reco...

question

English, 03.03.2020 02:39

The Good Finance Bank has a page on its website listing it’s history, staff credentials, and customer testimonials. Which choice best Explains the pur...

question

Mathematics, 03.03.2020 02:39

A bag contains 9 red marbles,5 green marbles, and 6 purple marbles. What are the odds of picking a red marble?...

question

Business, 03.03.2020 02:39

The three main project management goals are on time, within budget and achieving performance specifications. Should a project manager give up some fun...

question

Chemistry, 03.03.2020 02:39

Estimate the per-film value of a portfolio of sequel rights using a real options model. Build a binomial tree with 12 steps (∆t = 1 12 ) and assume a...

question

Business, 03.03.2020 02:39

The focus of the small company's marketing plan is: 1. its product or service. 2. the customer. 3. attracting capital. 4. an evaluation of key competi...

question

Physics, 03.03.2020 02:39

A series RL circuit includes a 6.05 V 6.05 V battery, a resistance of R = 0.655 Ω , R=0.655 Ω, and an inductance of L = 2.55 H. L=2.55 H. What is the...

question

Chemistry, 03.03.2020 02:39

The A-36 steel band is 2 in. wide and is secured around the smooth rigid cylinder. If the bolts are tightened so that the tension in them is 400 lb, d...

question

Business, 03.03.2020 02:39

As firms build databases that contain customer , marketing researchers must be careful not to abuse this collection, which may contain sensitive perso...

question

Mathematics, 03.03.2020 02:39

A projectile is fired vertically into the air. Its motion is described by h = -16t2 + 320t, where h is the projectile’s height (in feet) after t...

question

Spanish, 03.03.2020 02:39

Pide un plato de garbanzos....

question

Biology, 03.03.2020 02:39

What are the odds of nonsmokers developing cardiovascular disease when compared to smokers? A. Nonsmokers are four times more likely to develop cardio...

question

Biology, 03.03.2020 02:39

Imagine a poison was ingested that destroyed the hypothalamic cells that produce TRH (thyroid-releasing hormone). The effects on the anterior pituitar...

question

Mathematics, 03.03.2020 02:39

EXAMPLE 4 Find the directional derivative of the function f(x, y) = x2y7 − 2y at the point (2, −1) in the direction of the vector v = 4i + 5j. SOLUTIO...

question

Mathematics, 03.03.2020 02:39

The table in the shape of a circle has a diameter of 6 feet. How much fabric is needed to make a table cloth if it hangs 1 foot off the table all the...

More questions: Mathematics Another questions

Questions on the website: 13722362