at one high school, the mean time for running the 100-yard dash is 15.2 seconds with a standard deviation of 0.9 seconds. the times are very closely approximated by a normal curve. find the percent of times that are at least 14.3 seconds

Answers

Answer 1

Answer:

The percent of times that are at least 14.3 seconds is approximately 16%.

Step-by-step explanation:

Let X denote the time for running the 100-yard dash.

It is provided that the times are very closely approximated by a normal curve.

So, the random variable X follows a normal distribution with a mean time of 15.2 seconds and with a standard deviation of 0.9 seconds.

Compute the probability of times that are at least 14.3 seconds as follows:

[tex]P(X\geq 14.3)=P(\frac{X-\mu}{\sigma}\geq \frac{14.3-15.2}{0.9})[/tex]

                    [tex]=P(Z\geq -1)\\\\=1-P(Z<-1)\\\\=P(Z<-1)\\\\=0.15866\\\\\approx 0.159[/tex]

*Use a z-table.

Thus, the percent of times that are at least 14.3 seconds is approximately 16%.


Related Questions

Slope, m = 3, y-intercept, b = 5

Answers

Answer:

I can't help if I don't have enough to answer sorry

Step-by-step explanation:

solve each system by graphing.​

Answers

This is how I believe it would look like

3, -9, 27, -81.......

Neither
Arithmetic
Geometric ​

Answers

Answer:

Geometric

Step-by-step explanation:

sorry if I am wrong just let me know please

I think it’s Geometric

What are the missing angles?

Answers

1. 51
2. 34
3. 95
4. 38
5. 47
6. 74
7. 59

I hope this helps!!

This is Amy's box of candies.
She has already eaten 6 of them.

What fraction of the candies has Amy eaten?

Answers

Answer:

[tex] \frac{6}{9} [/tex]

or

[tex] \frac{2}{3} [/tex]

Step-by-step explanation:

There are nine in total and she has eaten 6, so the fraction would be 6/9.

If you need to simplify it it would be 2/3.

The ratio of employees who own a red car to employees who own a black car is
1:5. If there are 6 employees who own a red car, how many employees own a
black car? *

Answers

Answer:

There would be 30 black cars.

Since the ratio is 1:5

And we know that there are 6 red cars,

we basically just input it in our ratio

so it would look like 6:x

Now, we just have to plug in for x.

To do that, you have to multiply 6 by 5

To match the ratio.

So that would give us 6:30

And if we divide by 5 we should get our original ratio.

I know this seems confusing haha, but I hope you get it, it's not as hard as it looks !!

What is 4(2 + a) = 24
a=

Answers

a=4 biigchvuivbibiinon

Answer:

2/5

Step-by-step explanation:

Rearrange terms:

4(2 + a) = 24a

4(a + 2) = 24a

Distrbute:

4(a + 2) = 24a

4a + 8 = 24a

Subtract 8 from both sides of the equation:

4a + 8 = 24a

4a + 8-8 = 24a-8

Simplify:

4a = 24a - 8

Subtract 24a from both sides of the equation:

4a = 24a - 8

4a - 24a = 24a - 8 - 24a

Combine like terms:

-20a = -8

Divide both sides of the equation by the same term:

-20a = -8

-20a/-20 = -8/-20

Simplify:

Cancel terms that are in both the numerator and denominator

Divide the numbers

a = 2/5

I hope that helps! :D

By 27leejaey

3. Which is equivalent to the expression below?
4.5m + 8 - 2.3m - 3.5
A.6.7m
B. 6.8m + 4.5
C 2.2m + 11.5
D. 2.2m + 4.5

Answers

Answer:

D. 2.2m + 4.5

Step-by-step explanation:


The pottery store can make 176 coffee mugs in an 8 hour day. How many mugs can they make in one hour
Watch your units!

Answers

Answer:

22 per hour

Step-by-step explanation:

8 divided by 176 lol Hope I did it right tho ;-;

Answer:

they can make 22 in one hour.

Find the coordinates of the midpoint of a segment with endpoints A(-3,7) and B(8,-2)

Answers

Answer:

the midpoint is (2.5, 2.5)

at the zoo,the ratio of monkeys to gorillas is 5:1​

Answers

Answer:

thats a statement

Step-by-step explanation:

A store orders 22 boxes of light bulbs. Each box has 148 bulbs.
Which is the best estimate of the total number of bulbs the store orders?


plzzz answer.

Answers

Answer:

estimate, 3000. exact answer 3256

Step-by-step explanation:

hope this helps

A pet store sells dog treats and the prices are represented
in the graph
X = number of treats
y = cost (in dollars)
Select the true statement.
Select one
Each treat costs $0.50
Each treat costs $3
Each treat costs $2
Each treat costs 51

Answers

Answer: 1$

Step-by-step explanation:

You hear that tuition is going to increase by 3% next year. If tuition
this
year is $7,200 this year, what will the tuition be next year?

Answers

Answer: $7416

Step-by-step explanation:

You look up 3% of $7200 ($216) and add that to the original price to get $7416 :)

Which point is a solution to this system of inequalities?
y 6
A) (7,-8)
B) (2,-3)
C) (5,-2)
D) (4,1)

Answers

Answer:

h

Step-by-step explanation:

Answer:

the answer is  c

Step-by-step explanation:

Pls I need answer quick, pls

Answers

Answer:

its a hope this helps

Step-by-step explanation:

Are x and 1/x like terms?

Answers

Answer:

no

Step-by-step explanation:

we'll say x=5

5 does not equal 1/5

no, but x also means 1 and 1/x is different

HELLLLLPPPPPPPP MY SISTER HAS LATE HOMEWORKKKKK she need help with number 4. the empty space is the part where She need to show how She got her answer so if someone could help that would mean the world to me and her

Answers

Answer:

13

Step-by-step explanation:

13x4=52 that would be in the check section or whatever but she did really good

Answer:

Your sister did the equation perfectly. That's exactly how I would work it, and the answer is 13.

Solve the system, enter ur answer as an ordered triple.

Answers

Answer:

x = 1, y = -1, z = 3

Step-by-step explanation:

x - 2y + 2z = 9

y + 2z = 5

z = 3

According to the last equation, z is equal to 3 so we can plug that in and our new 2 equations will be:

x - 2y + 6 = 9

y + 6 = 5

We can subtract 6 from both sides of the second equation to end up with:

y = -1

Now plugging this into the first equation, we have:

x + 2 + 6 = 9

x + 8 = 9

Subtract 8 from both sides

x = 1

draw a graph for 4,16 ; 6,36 ; 8,64 ; 10,100 points​

Answers

Answer:

tyyyyy for free points have a great day

The stock of Company A gained $1.86 throughout the day and ended at a value of $94.86. By what percentage did the stock rise

Answers

Answer:

tTe answer is 1.96%

Step-by-step explanation:

given data

change in price/gain= $1.86

the closing price = $94.86

Required.

The percent rise.

Step two:

The formula for the percent rise is

=change/close price*100

substitute our given data

= 1.86/94.86*100

=0.0196*100

=1.96%

are any of these equivalent to 3/8 ?
2/7
8/3
9/24
5/18

Answers

Answer:

9/24 is

Step-by-step explanation:

Yup

-BaconSoup the scientist LOL

Answer:

9/24

Step-by-step explanation:

[tex]\frac{2}{7}= 0.28571428571\\\\\frac{3}{8}= 0.375\\\\\frac{2}{7}\neq \frac{3}{8}\\\\ \frac{8}{3}= 2.666...\\\\\frac{8}{3} \neq \frac{3}{8}\\\\\frac{9}{24}=\frac{9/3}{24/3} =\boxed{\frac{3}{8}}\\\\ \boxed{\frac{9}{24}=\frac{3}{8}}\\\\\frac{5}{18}= 0.27777...\\\\\frac{5}{18} \neq \frac{3}{8}[/tex]

Hope this helps.

I really need help please help me

Answers

Answer:

top right

Step-by-step explanation:

If you imagine yourself building with that model you can see its that one

Question:
Find the limit
x2 – 3x – 28/x-7
lim 7

Answers

See attachment for math work and answer.

Which inquality is graft below?

Answers

Answer:

Option C - 2x + y > 2

Step-by-step explanation:

We don’t have to do some serious math here. We can already eliminate half of the options just looking at it, because the graph has a dotted line, which means it does not include those values.

So, choses A and B are eliminated because the inequality shows the ≥ and ≤ symbol, which means that it does include those values. It’s either C or D because they have the > and < symbol, which means that the inequality does not include those values.

To have a better look at the inequalities, write them in slope-intercept form, which is y=mx+b:

Option C: y > -2x + 2

Option D: y < -2x +2

Just looking at the inequlaity symbol, we can tell that Option C is the correct one because it shows that all the y-values are greater than -2x + 2. Which is true because it’s shaded above the line. When it’s shaded above the line, it means that the y-values are greater.

To make sure my answer was correct, I graphed Option C. The image below shows Option C (2x + y > 2) graphed.

Hope this helps! :)

How to find the radius of a cylinder with only knowing it's height and diagonal thing here

Answers

The radius times pie equals the circumference. keep that in mind

there are 8 dinner rolls in a package. how many packages will be needed to feed 88 people if each person has 2 dinner rolls

Answers

Answer:

22

Step-by-step explanation:

8 times 10= 80 +8=88. now thats 11 packages. 11 times 2=22

HEY YOU! can you help me ?❤️

Answers

The answer is C.

If you take away one zero from both the denominator and the numerator, you are left with the fraction 6/10

12 hungry friends see 8 cupcakes sitting b.
on the table. If they split the cupcakes
equally, how many does friend each get?
12 other friends are told they can eat 0.8 cupcakes each. How many total cupcakes do these 12 friends eat?

I already got the answer for the first question, but i only want to know how to do the next question, I do NOT want the answer. Thanks!

Answers

1: 1/2 cupcakes
2: I’m in middle school so uhm-

Answer: a. 1 1/2   b. 9.6

Step-by-step explanation:



What is |-8|?
-16
-8
08
16

Answers

Answer:

it's 8

Step-by-step explanation:

lol girl I did this in the first day of school in 6th and I got the same answer , -8 is a negative, your supposed to put it back to a non negative when something is negative change it back to positive it's 8!

Other Questions
8/11 multiplied by (3/9 - 1/6) divided by 1 5/9 step by step please Elena uses 12 red beads to make 4 bracelets how many red beads will Elena need to make 12 bracelets What is thermodynamics?the movement of energythe classification of energythe way energy changesthe movement of heat My math teacher didnt give us any instruction on this quiz I would really like if someone could help me! Mightn't I have some help? Amelia collected 54 pieces of candy during Halloween. Of those 54 pieces, five-ninths had chocolate in them. Two-thirds of the ones that didn't have chocolate were gum. How many pieces of the 54 were gum? Show how you found your answer.plz help me If you breeded a bull dog and a shihtsu, what would it be called? Why were some enslaved Africans motivated to join the British in the American Revolution Chad has a rope that is 8 yards long. How many pieces of rope measuring 4/7 of a yard can he divide his rope into? A. 7 B. 28 C. 21 D. 14 Ok, here is a great question. If you type the full song "Burn" from hamilton, I will mark brainiest. I'll give you a hint. It starts with "I saved every letter you wrote me." Plzzzz be honest here. Don't copy and paste. If I think that you copied and pasted. I will ask you several questions about hamilton, and about Lin, and John Groff and other characters. I will not report tho. People reporting sucks. Have fun, and happy holidays!!! (Made the subject history, because it is!)-Cassi 12y - 15x + 6 please hurry Is Vaseline organic or inorganic explain why? How did African Americans in the post-Civil War era respond to the hostile environment of the South? answer 4 and 5 plzzzzzzzz PLEASE HELP !! Which words best describe the author's feelings about the day?1. happy and exhilarated2. battered and exhausted3. angry and frustrated4. easy and successful It was -5Cin Copenhagen and -12C in Oslo. Which city was colder? can sum1, please write an apology letter for throwing a chicken nugget at someone 50 words and ill give u 30pts Eric had $15.00 to spend on paints, which sold for $1.14 each. How many jars of paint can he buy?13141516 beCORRECTING SENTENCES BY ADDING APOSTROPHES Choose the word that uses the apostrophe(s) correctly. Ifa sentence is already correct, choose correct.The horses heads turned in anticipation when they heard Sarah's voice.a horse'sc. horsesb. horses'sd correct please help I will mark brainliest