When Tallulah runs the 400 meter dash, her finishing times are normally distributed with a mean of 79 seconds and a standard deviation of 0.5 seconds. Using the empirical rule, what percentage of races will her finishing time be between 78 and 80 seconds?

Answers

Answer 1

Answer:

Step-by-step explanation:

95%


Related Questions

Find the surface area. Show all of your work

Answers

Answer:

Surface area: 384in

Step-by-step explanation:

To find the surface area, you calculate the area of one side of the cube.

8 x 8 = 64

Once you get the area of one side of the cube, you multiply your new number by the number of sides in the cube. A cube has 6 sides, so you would multiply the area by 6.

64 x 6 = 384

Therefore, your surface area is 384in

please help pleaseee​

Answers

Answer:

4 Thank you cards

Step-by-step explanation:

lmk if you need the work on how i got it :)

The answer is 4 thank you cards

Because- 2.55x3=7.65 then

$20.00-7.65=12.35 will be the left over change

Now she/he needs to buy more thank you cards as many she can get so
Subtract it (2.99) 4 times then you get your answer Like this (12.35-2.99=9.36) (9.36-2.99=6.37) (6.37-2.99=3.38)
(3.38-2.99=0.39) now after that she can’t buy no more so after that, I subtracted 4 times so basically the answer is 4 thank you cards that she bought

When a button is pressed, a computer program outputs a random digit greater than 0 and less than 7. You press the button six times. How many possible outcomes are there?

Answers

Answer:

MELA PELA Y SE LA CHUPO GONORREA. SAPO HPTA

Step-by-step explanation:

XD :V

A bacteria population is doubling every hour. By what factor does the population change in 1/3 hour?

Answers

はあなたはまさたはたらたはまさたはあやたさまさたらたらまはまはまた

A garden table and a bench cost $772 combined. The garden table costs $72 more than the bench. What is the cost of the bench?

Answers

Answer: 700

Step-by-step explanation:

772

-72

____

700

700
I think I hate math

Help pleaseeee, I am lost and need help

Answers

Answer:

I'm pretty sure it is the second one because > means it won't be filled in and it means greater than so greater than 2

PLEASE I AM BEGGING YOU EXTRA POINTS AND BRAINLIEST!!!!!!!!!!!!!!!!!

Answers

Answer:

2/3(x+9)=22

Step-by-step explanation:

Answer:

1.12 2.12.gg

Step-by-step explanation:

1 and 2. ggg dude ytsr5e3uvrrhitghhbnnmkooyffrrcchutddb

plz solve i really need this

Answers

Set 2 I think hope I get it right

EMERGENCY PLS HELP: What is the area of the triangle?

Answers

Answer:

A=60

Step-by-step explanation:

A=l*w

A=12*5=60

Answer: The Area of the right triangle is 30(unit of measurement?)

Step-by-step explanation:

To find the area of a right triangle we need to use this formula

A=1/2·base·height

So A=1/2·5·12

Then we get A=1/2·60

So A=30

What is 1 plus 1

This is just a test because literally no one has been answering my questions.

What is up with people and posting files

Answers

1 + 1 is monke and the links are people trying to get your ip so they can get your information. don’t click on em

A certain gecko measured 3.5 inches as a hatchling, and then grows at a steady rate of 1.2 inches per month for the first 12 months. After that, the gecko grows at 0.4 inches per month for the next 16 months. How many inches long will the gecko be 20 months after hatching? please I need help and no link

Answers

Answer:

21.1 inches

Step-by-step explanation:

The gecko is 3.5 inches to start with.

If it grows at a rate of 1.2 inches per month for the first 12 months, after 12 months the gecko will be 14.4 inches larger. (Because 12 times 1.2 is 14.4)

So, after 12 months the gecko will be 17.9 inches.

Since the gecko grows at 0.4 inches per month for the next 16 months, and the gecko has grown for 20 months, all we need to do is subtract 12 from 20 (since we already calculated how long it will be after 12 months) and multiply that by 0.4.

Since 20 - 12 is 8, we just multiply 8 by 0.4 to get 3.2. We now add 3.2 to 17.9 to get 21.1 inches.

Hope this helps!

Solve for x. Round your answer to the nearest tenth if necessary.

Answers

Answer:

Step-by-step explanation:

9^2 + 15^2 = x^2

   81 + 225 = x

          17.49 = x

Rounded to the nearest tenth:

                 x = 17.5

     

I need this answered

Answers

This is an equilateral triangle, so all sides AND angles measure the same so y and x both equal 60 degrees (answer B)

What is the volume of the container?

Answers

Answer:

600

Step-by-step explanation:

Formula - length x width x height

(5 x 12 x 10)

600 cubic inches. length times width times height

The green shape is a dilation Of the black shape. What is the scale factor of the dilation?
Help plz...
No links!! I repeat No links!!

Answers

sorry I’m not smart but if I’m not wrong I think it’s 3/15...

The slope of the line that contains the points (1, -1) and (2, 3) is 4. What is the y-intercept? A. 5 B. 4 C. -4 D. -5

Answers

Answer:

4

Step-by-step explanation:

m= y2-y1

     x2-x1

m= 3+1  (anything minus a negative is a positive!)

     2-1

m=4

What is the y-intercept of the graph?

Answers

Answer:

6

Step-by-step explanation:

what is the mean,median,mode ,and range of 24,12,10,15,10,22,12

Answers

Answer:

24, 12, 10, 15, 10, 22, 12

mean:  7

median: 12

mode:  12

Range: 14

Step-by-step explanation:

Answer: Mean=15, Median=12, Mode=10 and 12, Range=14

Step-by-step explanation:

Data:

Numbers: 10, 10, 12, 12, 15, 22, 24

Mean: x, Median: x, Mode: x, Range: x

Step One, Find the Mean by adding all of the numbers and dividing them by the number of numbers

10+10+12+12+15+22+24=105/7=15

Mean=15

Reason: By adding all of the numbers together and dividing them by the number of numbers, you can find the mean because that is the method on finding the mean.

Step Two, Find the Median(middle) by finding the number in the middle

10, 10, 12, 12, 15, 22, 24

Median=12

Reason: Since the median is the number in the middle, 12 would be the median since it is the number in the middle of the array of numbers.

Step Three, Find the mode by finding the number that show up the most

10, 10, 12, 12, 15, 22, 24

Mode=10 and 12

Reason: Since mode is finding the number that shows up the most, 10 and 12 would be the answer for that reason and that they show up the same number of times in the array of numbers.

Step Four, Find the range by subtracting the biggest number by the smallest

24-10=14

Reason: Since to find the range you have to subtract the biggest number(24) by the smallest(10) the answer has to be 14 because that us the answer to 24-10.

I hope this helps!

NO LINKS OR ELSE I WILL REPORT. PLS HELP, I WILL GIVE BRAIN THING

Which two integers have a product of -120 and a sum of -2?

Answers

10 and -12

Step-by-step explanation:

10x-12=-120

it said it needed to be 20 characters long. so this is me making it that

Sheila either walks or cycles to school. The probability that she walks is 0.65, is she walks the probability she is late is 0.4. If she cycles the probability that she is late is 0.1. Work out the probability that on any one day Sheila will not be late for school

Answers

Answer:

0.705

Step-by-step explanation:

From the question :

P(not being late) = p(walking and not late) + P(cycling and not late)

P(walking and not being late) = 0.65 * (1 - 0.4) = 0.65 * 0.6 = 0.39

P(cycling and not being late ) = (1 - 0.65) * (1 - 0.1) = 0.35 * 0.9 = 0.315

Hence,

P(not being late) = 0.39 + 0.315 = 0.705

The distance on the map between Rocky Creek State Park and Hillcrest Elementary is 4.2 cm.
Approximately how far is Rocky Creek State Park from Hillcrest Elementary?

Answers

Answer:2

Step-by-step explanation: because

Answer: c. 420 m

Step-by-step explanation:

Which expression is equivalent to 15 + 35

Answers

Answer:

It says “which” so is it multiple choice??

Also a picture would help!!

On saturday, Mark sold 2 7/8 gallons of lemonade. On the same day, Regan sold 2/3 as much lemonade as Mark. How much lemonade, in gallons, did Regan sell?

Answers

2 7/8= 2/3L
Divide both sides by 2/3 and get 4.31 or 4 5/16

Hannah selects a marble randomly from a jar containing 11 green, 5 yellow, and 4 red marbles. Develop a probability model based on theoretical probability

Answers

55%green25%yellow20%red

Two friends have a total of 60 coins. If the first fried gives 1/4 of his coins to the second friend, they will have an equal number of coins. How many coins does the first friend have at the beginning?

Answers

Answer:

The first friend has 40 coins.

Step-by-step explanation:

The statement says that the two friend have a total of 60 coins, which can be expressed as:

x+y=60 (1), where:

x is the first friend

y is the second friend

Also, the statement says that if the first friend gives 1/4 of his coins to the second friend, they will have an equal number of coins which means that if you subtract 1/4 of the coins the first friend has this would be equal to the number of coins the second friend has now, which is:

x-1/4x=y+1/4x

x-1/4x-1/4x=y

y=x-2/4x

y=x-1/2x (2)

Next, you have replace (2) in (1) and solve for x:

x+x-1/2x=60

2x-1/2x=60

3/2x=60

x=60/(3/2)

x=(60*2)/(1*3)

x=120/3

x=40

Finally, you can replace the value of x in (2) in order to find the value of y:

y=40-1/2(40)

y=40-(20)

y=20

According to this, the answer is that the first friend has 40 coins.

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

Answers

Answer:

A) 35/12

Step-by-step explanation:

The tangent of an angle is the opposite side of that angle over the adjacent side of the angle

the formula for converting temperature from Fahrenheit (f) to celsius (c) is c= 5/4(f-32). if the temperature is 77 Fahrenheit, what is it in celsius?
a) 60 5/9 degrees c
B) 45 degrees c
c) 41 2/3 degrees c
D) 25 degrees c

Answers

Answer:

the answer is D) 25 degrees c

Answer: D) 25 degrees c

Step-by-step explanation:

Beth made wristbands and belts for a craft sale. She sold 30 of these items. Each wristband sold for $5.50. Each belt sold at $8.75. If Beth made $204 at the craft sale, how many wristbands did she sell? How many belts did she sell? Write and solve a system of equations to solve the problem. Show work.

Answers

Answer:

Both sold 18 wristbands and 12 belts

✂----------------------

Let, number of wristbands = x

number of belts = y

[tex]x+y=30[/tex]  ➞ [tex]x~5.5[/tex]

[tex]5.50x+8.75y=204[/tex] [tex]x1[/tex]

[tex]5.50x+5.5y=165\\5.5x+8.75y=204\\---------\\-3.25y=-39[/tex]

[tex]y=-39/3.25[/tex]

[tex]y=12[/tex]

[tex]x=30-12=18[/tex]

[tex]So, Both~ sold ~18 ~wristbands ~and ~12~ belts[/tex].

❄❄❄❄❄❄

hope it helps...have a great day!!

A ladder leans against the side of a house. The angle of elevation of the ladder is 75° when the bottom the ladder is 16 ft from the side of the house. Find the length of the ladder. Round your answer to the nearest tenth. 

Answers

Answer:

cos 75 = 16/x ---> x = 16/cos75 = 61.8 ft.

Perpendicular to x+y=6 and passing through (0,1)

Answers

Answer:

y = x + 1

Step-by-step explanation:

x + y = 6

y = -x + 6

Perpendicular slope to -1 is 1

(0,1)

y - y1 = m(x - x1)

y - 1 = 1(x - 0)

y - 1 = x

y = x + 1

Standard form:

y = x + 1

-x + y = 1

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