for a certain online store, the distribution of number per hour is approximately normal with mean 1200 purchases and standard deviation 200 purchases. for what proportion of hours will the number of purchases at the online store exceed 1400?
a)5%
b)68%
c)16%
d)32%
Answers
Answer: 16%
Step-by-step explanation:
When we have a normal distribution, the 100% of our sample will be placed in a "gaussian bell".
Where the middle of this bell coincides with the mean.
The mean, in this case, is 1200, and the standard deviation is 200.
In the image below you can see that between the points.
Mean + standard deviation and the end of the graph, we have:
13.5% + 2.35% + 0.15% = 16%
And particularly, if we want to know the percentage that exceed 1400, will be the same percentage above the mean plus the standard deviation.
mean = 1200
SD = 200
mean + standard deviation = 1200 + 200 = 1400.
Then the percentage that exceeds 1400 is equal to the percentage that we found above, then the correct option is C: 16%
Related Questions
Write the decimal expansion for 5/6.
Answers
Answer:
≈ 0.8333333333333
Step-by-step explanation:
Since anything divided by 6 is a repeating decimal, we know it will go on forever.
Answer:
0.8333333333333
Step-by-step explanation:
:)
9. The sum of two consecutive integers is 41 less than
four times the larger. Find the numbers.
Answers
Answer:
19 and 20
Step-by-step explanation:
Let x be the larger number
x - 1 + x = 4x - 41
We can combine like terms and isolate x:
2x - 1 = 4x - 41
2x = 40
x = 20
20 - 1 = 19
!!20 POINTS!!
Lucy can buy up to 12 pencils at the store. The cost of the pencils is shown in
the graph. What is the domain?
Answers
Answer:
th domain is 6$ dollar and c . all whole numbers from 0 to 12
Select the three expressions below that result in a negative solution.
-4 - 15
11 + (-22)
(-3) - (-9)
7 + (-8)
(-15) + (-10)
Answers
Step-by-step explanation:
-4-1511+(-22)7+(-8)(-15)+(-10)-4 - 15
11 + (-22)
7 + (-8)
(-15) + (-10)
I know you said to select three expressions, but four of the options will result in a negative solution.
Hope that helps!
-Grace
Derek buys two submarine sandwiches for an after-school party. One sandwich is 18 inches long and the other sandwich is 12 inches long. Derek wants to cut servings of the same length from both sandwiches without having any sandwich left over. what is the greatest length serving that Derek can cut
Answers
Answer:
6 in
Step-by-step explanation:
18/3=6
12/2=6
So, total 5 pieces of 6 inches of length
A girl is 30 months old . What is her age in years and months
Answers
Hey there!
[tex]Answer:\boxed{\text{2 years and 6 months}}[/tex]
[tex]Explanation:[/tex]
[tex]30\text{ months}=2.5\text{ years}=2\text{ years}\text{ and }6\text{ months}[/tex]
[tex]\boxed{\text{2 years and 6 months}}\text{ is your answer.}[/tex]
Hope this helps!
[tex]\text{-TestedHyperr}[/tex]
Solve for x. 5x+4=9
Can you help me out?
Answers
Answer: x=1
Step-by-step explanation:
5x+4=9
5x=5
X = 1
Porfavor alguien me dice cuanto es esto 3×?=20
Answers
Answer:
6.66666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666666
Step-by-step explanation:
Que no se te olvide el punto
Answer:
es imposible
Step-by-step explanation:
3x7=21
se va por uno
the following data set lists average life span(in years) of 16 different animals found in Africa.
5,10,10,10,11,14,15,18,20,20,27,35,40,50
identify the following information from the data set.
mean:
minimum:
range:
median:
lower quartile(Q1)
upper quartile(Q3)
Answers
Answer:
mean: 20
minimum: 5
range:45
median:16.5
I need help fast,zoom in to se it better
Answers
Megan bought 3 pounds of apples that cost x dollars per pound. She gave the cashier a 20-dollar bill.
Which equation could Megan use to find the amount of change, y, she should receive?
Answers
Answer:
20/(3x)=
Step-by-step explanation: I know for sure this is right!!
Point K on the number line shows Kelvin's score after the first round of a quiz: In round 2, he lost 9 points. Which expression shows how many total points he has at the end of round 2? 3 + (−6) = −9, because −9 is 6 units to the left of 3 3 + 6 = −9, because −9 is 6 units to the left of 3 3 + (−9) = −6, because −6 is 9 units to the left of 3 3 + 9 = −6, because −6 is 9 units to the left of 3
Answers
Complete question :
Point K on the number line shows Kelvin's score after the first round of a quiz: A number line is shown from negative 10 to 0 to positive 10. There are increments of 1 on either side of the number line. The even numbers are labeled on either side of the number line. Point K is shown on 3. In round 2, he lost 9 points. Which expression shows how many total points he has at the end of round 2? 3 + (−6) = −9, because −9 is 6 units to the left of 3 3 + 6 = −9, because −9 is 6 units to the left of 3 3 + (−9) = −6, because −6 is 9 units to the left of 3 3 + 9 = −6, because −6 is 9 units to the left of 3
Answer: 3 + (−9) = −6, because −6 is 9 units to the left of 3
Step-by-step explanation:
Given the following :
Width of number line = - 10 to + 10
Point K on the number line = +3 ( kelvin's score after the first round of quiz).
If Kelvin losses 9 points in round 2 = - 9
Hence at the end of round 2, He'll have a total of :
Point at the end of round 1 + point lost in round 2
3 + (-9) = - 6
Edith ordered 588 tomatoes for the produce section. if there are 84 per crate, how many crates will she receive?
Answers
Answer:
7 crates of tomatoes
Step-by-step explanation:
588÷84=7
Answer:
7 Crates of tomatoesStep-by-step explanation:
This is a simple division problem. To find out the number of crates, we need to divide 588 by 84.
588/84 = 7
7 Crates of tomatoes___________________________________________________I AM ALWAYS HAPPY TO HELP :)Simplify (x^3/x^2)^2 . Explain your steps.
Answers
Answer:
Step-by-step explanation:
(x^3
x^2)^2
X³ )²
X²
X³*²
X²*²
X ⁶
X⁴
X ⁶-⁴ = X²
What is -1 29/40 as a decimal ? - show work plz:(
Answers
Answer:
Step-by-step explanation:
A mixed number is an addition of its whole and fractional parts.
−(1 + 29/40)
Add
1 and 29/40
Write 1 as a fraction with a common denominator.
−(40/40 + 29/40)
Combine the numerators over the common denominator.
−40+29/40
Add 40 and 29
−69/40
The result can be shown in multiple forms.
Exact Form:−69/40
Decimal Form:−1.725
Mixed Number Form:−1 29/40
Answer:
I DONT CARE
Step-by-step explanation:
Given two sequences
A) 3, 5, 7, 9, 11....
B) 3, 6, 12, 24...
Write the nth term of the above each sequence
Answers
Answer:
[See Below]
Step-by-step explanation:
✦ Given that [tex]y=x+2[/tex] the next numbers would be:
✧ [tex]13[/tex]
✧ [tex]15[/tex]
✧ [tex]17[/tex]
✧ [tex]19[/tex]
✦ Given that [tex]y=x+x[/tex] the next numbers would be:
✧ [tex]48[/tex]
✧ [tex]96[/tex]
✧ [tex]192[/tex]
✧ [tex]384[/tex]
✧ [tex]768[/tex]
~Hope this helps Mate. If you need anything fell free to message me.
The formula P=2(l + w)relates the perimeter P, in decimeters, with the length and width of a rectangle.
Solve the formula for w.
1.w=2P-L
2.w=P/2+L
3.w=P/2-L
4.w=2P+L
Answers
Answer:
3. w=P/2-L
Step-by-step explanation:
Given formula:
P=2(l + w)Solving for w:
P=2(l + w)P/2 = 2(l + w)/2P/2 = l + wP/2 - l = l + w - lP/2 - l = ww = P/2 - lCorrect answer choice is:
3. w=P/2-LUse the given conditions to write an equation for the line in point-slope form and general form. Passing through (-4,8) and parallel to the line whose equation is 3x-8y-7=0
Answers
Step-by-step explanation:
Hey there!
The equation of a st.line passing through point is;
(y - 8) = m1(x+4).........(i).
And another equation is;
3x - 8y - 7 =0.......(ii)
From equation (ii), we get;
[tex]slope(m2) = \frac{ - coeff. \: of \: x}{coeff. \: of \: y} [/tex]
[tex]m2 = \frac{ - 3}{ - 8} [/tex]
Therefore the slope is 3/8.
As they are parallel lines, their slopes are eaual.
i.e m1 = m2 = 3/8.
Putting value of slope (m1) in equation (i).
[tex](y - 8) = \frac{3}{8} (x + 4)[/tex]
Simplify them to get equation.
[tex]8(y - 8 ) = 3x + 12[/tex]
[tex]8y - 64 = 3x + 12[/tex]
[tex]3x - 8y + 12 + 64 = 0[/tex]
[tex]3x - 8y + 76 = 0[/tex]
Therefore therequired equation is 3x - 8y +76=0.
Hope it helps...
is all negative numbers intergers ?
Answers
Answer:
Yes. Intergers are all whole numbers so negative whole numbers are included too.
Step-by-step explanation:
Answer:
yes
Step-by-step explanation:
because an integer is all whole numbers and their opposites
is 0.31311311131111...is it a rational or irrational?
Answers
-3 x -6 = 9
[tex] - 3 \times - 6[/tex]
3 × 6 = 9
negative times a negative equals a positive so it would be positive 9 not negative 9
Answers
Explanation: An even number of negatives always equal a positive and an odd number of negatives always equals a negative.
How do you divide decimals.
Answers
Answer:
we need to shift decimal then divide
Step-by-step explanation:
First we move the divisor (if its a decimal) to the right until there is no more dot. If your dividend is also a decimal you also need to move it to the right how many spaces you moved the divisor's.
Example:
923.56 ÷ 4.5
This means that we move the dot between 4 and 5 once. We do the same to 923.56.
This means our division problem will be
9235.6 ÷ 45.
Now just do the problem normally as you should.
What is the perimeter of a square rug to the nearest tenth if the total area of the rug is 96 feet2? Round your answer to the nearest tenth.
Answers
Answer:
PERIMETER=4a
a=side
PERIMETER=4*96
PERIMETER=384 feet square
or 384 feet square rounded to nearest tenth is 400 feet square
Step-by-step explanation:
hope it help ^_^
8 mm
25 mm
8 mm
5 mm
5 mm
8 mm
8 mm
5 mm
5 mm
8 mm
8 mm
25 mm
Answers
Answer:
40 + 40 + 125 + 125 + 200 + 200 = 730
Step-by-step explanation:you need to find the area of every square/rectangle in the figure, so 2 of the shapes are 8 x 5, 2 of them are 5 x 25, 2 of them are 8 x 25 getting you 730 mm^2
Step-by-step explanation:
730mMmM
WILL GIVE BRAINLIST!
The options in the select area are Add and subtract Multiply Addition and Subtraction properties of equality Descriptive Property
Answers
2. Subtract
3. Add
4. Subtraction properties
Brainlist please if it’s rite?
You have a wooden rod which is 24 1/2 inches long. Carlos needs a piece which is 8 3/4 inches long and Amanda needs a piece which is 6 3/8 inches long. How long will the rod be after you cut those pieces to give to Carlos and Amanda?
Answers
Answer:
8 3/4 inches
Step-by-step explanation:
Total length of the rod = 24 1/2 inches
Carlos = 8 3/4 inches
Amanda = 6 3/8 inches
length of the rod remaining = Total length - ( Carlos + Amanda)
= 24 1/2 - (8 3/4 + 6 3/8)
= 49/2 - (35/4 + 51/8)
= 49/2 - ( 75+51/8)
= 49/2 - 126/8
= 196-126/8
= 70/8
= 8 6/8 inches
= 8 3/4 inches
Length of rod remaining = 8 3/4 inches
Answer:
9 3/8
Step-by-step explanation:
what is a perfect square trinomial and can you provide an example
Answers
A perfect square trinomial is a trinomial that factors as two identical binomials.
For example, x² + 8x + 16 factors as (x + 4)(x + 4) or (x + 4)².
Another example would be x² - 12x - 36 which factors as (x - 6)².
Solve for n
4 + (n + 10) = 25
Answers
n+10=21
n=21-10
n=11
Answer:
n =11
Step-by-step explanation:
solve for x by simplifying both sides of the equation then isolating the variable
Suppose R is plotted in the above coordinate plane and is collinear with A and B. If the ratio AR: AB is 1/3, then what are the coordinates of R?
Answers
Answer:
=-4/2
Step-by-step explanation:
xp=x1 +k (x2-x1)
=-3+1/3 (2- -3)
=-3 + 1/3 (5/1)
= -3 + 5/3
= -9/3 +5/3
= -4/2
sorry it doesnt look the best :)
Answer:
(3,2.4)
Step-by-step explanation:
Which list of fractions is in order from smallest to largest? A.1/2, 1/6, 1/3, B. 1/6, 1/3, 1/2, C. 1/6, 1/2, 1/3 D. 1/3, 1/3, 1/6
Answers
Answer:B 1/6,1/3,1/2
Step-by-step explanation:
1/6= 0.167, 1/3= 0.33, 1/2= 0.5
I'm sure that the answer is B. 1/6, 1/3, 1/2 :)
