On a standardized exam, the scores are normally distributed with a mean of 250 and
a standard deviation of 50. Find the 2-score of a person who scored 375 on the exam.
Answer:
the z-score is within 3
Step-by-step explanation:
first you got to take the standard deviation and add it to the mean since 375 is greater than 250. so the equastion would be
250+50=300+50=350+50=40
so the z-score for the value of 375 is within 3
Answer: 2
Step-by-step explanation:
z=\frac{x-\mu}{\sigma}
z=
σ
x−μ
z-score formula
z=\frac{300-250}{25}
z=
25
300−250
Plug in values
z=\frac{50}{25}
z=
25
50
Subtract
z=2
z=2
Divide
\text{They scored 2 standard deviations above the mean.}
They scored 2 standard deviations above the mean.
Math question:
I'm not good at math so pls help me
Answer:
c
Step-by-step explanation:
Answer: D: 1/14
Step-by-step explanation:
1/7 chance of picking orange marble, times 1/2 chance of flipping tails.
1/7 X 1/2 = 1/14
Which of the x-values are solutions to the following inequality?
x <100
Choose all answers that apply:
Answer:
x=54
x=89
Step-by-step explanation:
I think it is the answer
ls 2.1 bigger or 2.9?
Answer:
2.9
Step-by-step explanation:
The answer is 2.9
Step by step:
Select all the words which accurately describe the triangle below
Answer:
Acute-Angle
Step-by-step explanation:
Answer:
Acute
Step-by-step explanation:
im running out of things to say
Answer:
i think its b
Step-by-step explanation:
20 points!!! Find the volume of these figures
Answer:
Its only 10 points
Step-by-step explanation:
Answer:
Step-by-step explanation:
9)
it's a right triangle, you should know how to find the area for this one :/ I'll give you the formula , you can push the buttons on a calculator ? right? Okay to be fair, I see that there is one extra step, so i'll do that part for you.
Ф=arcSin(8.5/15.7)
Ф = 32.77908067°
15.7*Cos(32.77908067°) = base
13.2 =base
⇒ use this formula ⇒ (1/2)*base*height*depth
just in case base = 13.2
height = 8.5
depth = 6.2
you got it ? right?
10)
we have to solve for the "adjacent side" of the triangle, which will also be the diameter of the cylinder , so
sin(Ф) = 9.5/19.3
Ф= arcSin(9.5/19.3)
Ф= 29.48712567°
19.3*cos(29.48712567°) = Adjacent
16.8 =Adjacent ( diameter of circle)
16.8/2 = radius
8.4 = radius
area of circle = [tex]\pi[/tex][tex]r^{2}[/tex]
area of circle = 221.6707776 [tex]m^{2}[/tex]
volume of a cylinder = area of circle * height
volume of a cylinder = 221.6707776 * 9.5
volume of a cylinder = 2105.872388 [tex]m^{3}[/tex]
11)
we need the formula for an equilateral triangle area
Equilateral Triangle Area = [tex]\sqrt{3}[/tex]/4)* [tex]a^{2}[/tex]
ETA = ([tex]\sqrt{3}[/tex]/4)*[tex]12^{2}[/tex]
ETA = 62.35382907 [tex]mm^{2}[/tex]
Volume Of Prism = length * area
VOP = 17 * 62.35382907
VOP = 1060.015094 [tex]mm^{3}[/tex]
What is the interquartile range (IQR) of the data set represented by this box plot?
Answer:
The IQR (interquartile range) of the data set represented by this box plot is 22 units.
Step-by-step explanation:
Each number of the data set represented as a box plot is something the numbers have individually. The lowest number there (the first number), 38, is called the minimum. The highest number there (the last number), 75, is called the maximum. The second number there, 45, is called the lower quartile. The third number there, 50, is called the median or middle quartile. The fourth number there, 67, is called the higher quartile. In order to find the interquartile range, you need to find the difference between the lower quartile and higher quartile, which means to subtract.
67 (highest quartile) - 45 (lower quartile) = 22 (interquartile range)
Therefore, the IQR (interquartile range) of the data set represented by this box plot is 22 units.
Answer:
It’s 22
Step-by-step explanation:
Find the measure of the missing angle 40 and 90
Answer:
50
Step-by-step explanation:
all triangles equal a total of 180 degrees
so add 40+90
130 subtract
180-130 = 50
Sue went to the grocery store. A package of hamburgers contains 6 hamburgers. A pack of hamburger buns contains 8 buns. What is the
least number of packs of buns Sue needs to buy to have the same number of hamburgers and buns?
Answer: 1 if 1 bun is the top and bottom
Step-by-step explanation:
Need to answer questions
Answer:
The least common multiple of 8 and 6
burgers: 6, 12, 18, 24
buns: 8, 16, 24
Step-by-step explanation:
6×8=24
12×2=24
So that is how you get the answer by seeing if they have any integers in common.
Im sorry but this due today
Answer:
I would say it 11a+5 I'm not sure tho
The equation y = 450x represents the number of miles alrplane traveled y ot x hours. The graph below shows the number miles a 5hour flight , after 2 hours which airplane had traveled the farther and by how much ? I need help
Answer:
y = 200x.....the airplane travels 8000 miles in 40 hrs
Step-by-step explanation:
Answer:
Airplane W by 100 miles
Step-by-step explanation:
Airplane Z
y = 450x
Distance travelled after 2 hours
y = 450(2)
y = 900 miles
------------------------
Airplane W
Distance travelled after 2 hours
Reading from the graph
1000 miles
----------------------
after 2 hours which airplane had traveled the farther
Airplane W
and by how much
1000 - 900 = 100
What is the measure of angle R?
What is the lenghth of a baseball cap 30 kilometers or 30 meters or 30 millimeters or 30 centimeters
Answer:
30 centimeters
Step-by-step explanation:
1. 30 kilometers is way too large for a baseball cap to be measured in. Kilometers are usually used to measure distances between cities.
2. 30 meters is also too large for a baseball cap to be measured in. 30 meters are about 15 basketball players stacked on top of one another.
3. Last and remaining choice is 30 cm. 30 cm is about the same length as a 12 inch ruler.
What is the value of x in the figure below?
Answer:
x = 125°
Step-by-step explanation:
180° - 55° = 125°
125°
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Can someone plz help me on this I’m bad at doing these plz I bed u I beg u plz
Answer:
I'm sorry me dont know kfnkdks
Answer:
A
Step-by-step explanation:
Area of the rectangle
A = base x width = 8 x 6 = 48 cm^2
Area of the triangle
A = (base x height)/2 = (6 x 4)/2 = 12 cm^2
two semicircles are equal to a circle
radius = diameter / 2 = 3/2 = 1.5 cm
A = radius^2 x pi = 1.5^2 x pi = 7 cm^2 (round to the nearest whole number)
total area
48 + 12 + 7 = 67 cm^2
What are five steps for solving percentage problems?
Answer:
Find the percentage of the original or real number.
Multiply the final number by 100.
Divide the result of the multiplication by the percentage.
Have a great day
The proportion of the original or true number is then added 100 to the final figure.
What is the percentage?It's the ratio of two integers stated as a fraction of a hundred parts. It is a metric for comparing two sets of data, and it is expressed as a percentage using the percent symbol.
Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.
Let's suppose it is required to find the x percentage of y:
First step:
= x% of y
Second step:
= (x/100)y
Third step: Divide x by 100
= 0.01xy
Fourth step: Multiply the remaining term(0.01x and y).
= 0.01xy
The fifth step: Round off if required
= 0.01xy %
Calculate the proportion of the original or true number.
Add 100 to the final figure.
Subtract the percentage from the multiplication result.
Thus, the proportion of the original or true number is then added 100 to the final figure.
Learn more about the percentage here:
brainly.com/question/8011401
#SPJ2
Find the circumference of the object. Use 3.14 or 22/7 for pi . Round to the nearest hundredth if necessary. 6in
Answer:
37.7
Step-by-step explanation:
Circumference=
[tex]2\pi \times r[/tex]
At 11:00 AM. the temperature was 37 °F. At 11:00 PM the temperature was -6 °F.
What was the change in temperature between 11:00 AM and 11:00 PM?
PLEASE HELP!!! I WILL GIVE BRAINLIEST (NO LINKSSSS OR ELSE I WILL HUNT YOU DOWN)
how many millimeters equal 1942 cm^3
Answer:
multiply the volume value by 1000
Step-by-step explanation:
¯\_(ツ)_/¯ᵐᵃʸᵇᵉe
Answer:
1942 cubic centimeter
1942000 cubic millimeter
Use the rectangle to answer the question.
12 millimeters
9 millimeters
What is the area of the rectangle?
O A 21 square millimeters
OB. 42 square millimeters
O c. 81 square millimeters
OD. 108 square millimeters
ОЕ.
144 square millimeters
Answer:
12 x 9 = 108
Step-by-step explanation:
Just multiply the 2 given lengths when finding AREA of a rectangle.
Answer:
D.108
Step-by-step explanation:
PLEASE HELP FAST! What is the distance between the two points located at (14, 27) and (14, −8)? this is in units.
Answer:
13
Step-by-step explanation:
13
Answer:
I think the answer is
Distance: 26 (if rounded up).
Step-by-step explanation:
d=(27−14)2+(−8−14)2−−−−−−−−−−−−−−−−−−−√
d=(13)2+(−22)2−−−−−−−−−−−−√
d=169+484−−−−−−−−√
d=6–√53
d=25.553865
Convert the following radian measure to degrees.
0.9102
52.151°
0.9102rad × 180/π = 52.151°
The Martins want to buy a new computer. The regular price is $849. The store is offering a 20% discount. What
is the total cost of the computer?
Answer:
679.20
Step-by-step explanation:
i used math plz mark branliest
What is 27 divide by eight
Answer
= 3. 3 75
Step-by-step explanation:
27 / 3 = 3.375
PLEASE NO WRONG ANSWER
What are the coordinates of the midpoint of diagonal LN?
Answer:
4. (-2 1/2, 4 1/2)
Step-by-step explanation:
Midpoint Formula is (x1+x2)/2, (y1+y2)/2
So (-6+1)/2 , (1+8)/2 = (5)/2, (9)/2 = (2.5,4.5)
And that in fraction form is (-2 1/2, 4 1/2)
Enter the value of p so that the expression 4(n + 8) is equivalent to (n + p)4.m
Answer:
8 is the value of p
Answer:
n=0 p=8
Step-by-step explanation:
The president of a computer company must decide whether to place the company's new laptop on the market now or wait another year and continue with product testing.
The company's employees inform the president that if he releases the laptop now and no competitive devices enter the market, there will be a profit of $120,409.00; however, if he releases the laptop now and a competitive device enters the market, there will only be a small profit of $29,698.00. The company's employees also inform the president that if he waits another year and no competitive device enters the market, there will be a profit of $84,742.00; however, if he waits another year and a competitive device enters the market, there will be a loss of $59,396.00.
Suppose the company determines that there is a 22% chance that a competitive device will enter the market. What should the president do to maximize the expected profit over the next year?
Answer:
The president should release the new laptop now
Step-by-step explanation:
The profit if the new laptop is released now and no competitive device enters the market = $120,409.00
The profit if the new laptop is released now and a competitive device enters the market = $29,698
The profit if the new laptop is released in a years time and no competitive device enters the market = $84,742.00
The loss if the new laptop is released in a years time and a competitive device enters the market = $59,396.00
The chance that a competitive device will enter the market = 22%
∴ The chance that a competitive device will not enter the market = 1 - 22% = 78%
The expected increase in profit the company can make, compared to next year, if the new laptop is released and no competitive device enters the market = ($120,409.00 - $84,742.00) × 78% = $27,820.26
The expected increase in profit the company can make, compared to next year, if the new laptop is released and a competitive device enters the market = ($29,698.00 - $59,396.00)×0.22 = ($6,533.56) loss
Therefore, to maximize the expected profit over the next year, the president should release the new laptop now to make an expected profit of $27,820.26 over the next year.
find the surface area please help
Answer:
the answer is 30
Step-by-step explanation:
hight x base²
Answer:
AS =282.7cm²
Step-by-step explanation:
SA = 3.14×r×L +3.14×r²
L²=5²+12²
L=13)
= 3.14×5×13 + 13.4x5²
AS=282.7cm²