Answer:
68.268%.
Step-by-step explanation:
Let \mu be the mean pregnancy length.
The given standard deviation, [tex]\sigma=7[/tex] days
The z-score:
z=\frac{x-\mu}{\sigma}
where x is any pregnancy length.
The range of x within 7 days of the mean pregnancy length is
[tex]\mu-7<x<\mu+7.[/tex]
z-score for this range is:
[tex]\frac{\mu-7-\mu}{\sigma}<z<\frac{\mu+7-\mu}{\sigma}[/tex]
[tex]\Rightarrow -1<z<1[/tex]
So, the area on the normally distributed curve for the above range of z-score will give the expected percentage of birds to occur within 7 days of the mean pregnancy length.
Now, from the z-score table:
The area from [tex]z = -\infty[/tex] to z=1 is 0.84134
and the area from [tex]z = -\infty[/tex] to z=-1 is 0.15866.
So, the area for -1<z<1
=0.84134 - 0.15866
=0.68268
Hence, the percentage of births would be expected to occur within 7 days of the mean pregnancy length=68.268%.
will somebody help me with this question 9 x 3/4
Answer:
Improper way: 27/4
Mixed number: 6 3/4
Step-by-step explanation:
To make it easier, put a 1 under the 9. So you get 9/1.
It should look like this: 9/1 x 3/4
Then simply multiply 9 and 3 then 1 and 4.
You get 27/4!
2 less than 3 times a number greater than 10. Write as inequality
Answer:
2<3x>10
Step-by-step explanation:
2<3x>10
The perimeter of a rectangle is 48 centimeters. The relationship between the length, the width, and the perimeter of the rectangle can be described with the equation 2 * length + 2 * width = 48 Find the length, in centimeters, if the width is 10 centimeters
Answer:
14
Step-by-step explanation:
2xL + 2x10 = 48
2xL + 20 = 48
2xL = 28
L = 14
Answer:
14
Step-by-step explanation:
yes
which is the graph of a linear equation x - 2y equals 6
This is the graph hope this helps.
PLEASE HELP WILL GIVE BRAINLIEST!!!!!!!!!!
Answer: you have: C(X)=3x+2.00
x=number of minutes
Pay attention to the y=mx+b form where m=slope-->>
3x is the slope...
so it's 3(times the number of minutes) <<---or (x)
This means that the slope is 3, or the fancy way of saying it-->>"rate of change."
The rate of change of the cost of the taxi ride is $3.00 per minute.
Step-by-step explanation:
You are a contractor and charge $65 for a site visit plus an additional $15 per hour for each hour you spend working at the site. Write and solve an equation to determine how many total hours you have to work to earn $950 working at two separate work sites
Answer:
h = 59 hours
Step-by-step explanation:
Total earnings = fixed charge + variable charge
Fixed charge = $65
Variable charge = $15h
Where, h = number of hours
Total earnings = $950
Total earnings = fixed charge + variable charge
950 = 65 + 15h
Subtract 65 from both sides
950 - 65 = 65 + 15h - 65
885 = 15h
Divide both sides by 15
h = 885 / 15
= 59
h = 59 hours
Express the ratio 6:2:6 in its simplest form.
Answer:
in simplest form it is like 3:1;3...
How was triangle A translated?
O four units left
O four units right
O six units left
O six units right ark this andTetrn
Answer:
D
Step-by-step explanation:
i know its six units right but i dont know what the rest of the answer says tho
Answer: D
Six units right
Step-by-step explanation:
I got it right on edg2020
which number are a distance of 7 units from 1 on the number line -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7 8 9 10
Answer:
8, -6
Step-by-step explanation:
The point-slope form of a line that has a slope of , and passes through the point (3, 0) is shown.
y-0 =3(2-3)
What is the equation in slope-intercept form?
Answer:
y= -3Step-by-step explanation:
[tex]y-0 =3(2-3)[/tex]
Expand ; 3(2-3) = 6-9
[tex]y-0=6-9\\\\Simplify\\\\y-0=-3\\y =-3+0\\\\y =-3[/tex]
Which Reason would be used to relate the named angles?
Corresponding Angles
Alternate Interior Angles
Same Side Interior
O None of the above
Brady noticed that there were 38 cars in the parking lot. 7 of the cars were blue.
What decimal represents the percent of the cars that were blue? Round your answer to the nearest hundredth.??????!!!! Help! :)
Answer:
Step-by-step explanation:
7 blue cars out of 38 cars.
To find the percentage you just divide using your calculator and you should get something like this :
[tex]\frac{7}{38}[/tex] = 0.1842105263
Then you just round that to the nearest hundredth.
If you round 0.184 to the nearest hundredth, it will be 0.18 (You have to round down since the number 4 in the thousandth place is smaller than 5)
How many times bigger is Triangle H than Triangle B ?? Pls help me ty
Answer:
4/3
Step-by-step explanation:
Divide one side of Triangle H by 1 side of triangle B to get the scale factor
can someone help me with the math on my page i will mark them brainliest pls
Answer:
Step-by-step explanation:
ok
One example of consecutive odd integers would be 3, 5, 7, 9, ...
If the first consecutive odd integer is represented by x, which algebraic expression represents the second
consecutive odd integer?
____
Which expression represents the third consecutive odd integer?
____
The answers are
X+2
X+4
Answer:
1.) x+2
2.) x+4
Step-by-step explanation:
I got it right on Edge, hope this helps
The expression represents the second consecutive odd integer is X + 2
and for the third consecutive odd integer is X + 4.
What are integers?All whole numbers and negative numbers are considered integers. This means that if we combine negative numbers with whole numbers, a set of integers is formed.
An integer, which can comprise both positive and negative integers, including zero, is a number without a decimal or fractional portion.
Given One example of consecutive odd integers would be 3, 5, 7, 9, ...
the difference between 2 consecutive numbers is
5 - 3 = 2
when X is the first odd integer,
the second consecutive odd integer is X + 2
difference between 3rd and first digit is
7 - 3 = 4
the third consecutive odd integer is X + 4
Hence adding the consecutive even numbers to the first digit of odd numbers gives the consecutive odd numbers.
Learn more about integers;
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An electronics store is selling the latest video game for $59.00. If there is a 10% sales tax, what is the actual cost of the game?
Answer:
64.90
Step-by-step explanation:
10% of 59.00 is 5.90 so 59.00 +5.90 equals 64.90
Plz only answer if ur sure about the answer :)
Answer:
66r+77 | -14k+9
Step-by-step explanation:
i gotchu big daddy
Which of the following is NOT a term used to describe slope?
Unit Rate
Constant of Proportionality
Change in X over Change in Y
Rate of Change
Answer:
Change in X over Change in Y
Step-by-step explanation:
The slope is represented by the change in Y over the change in X. Therefore, the third answer is not correct because the proportion is incorrect.
I need help please!!! I have a math test tomorrow but i have no idea how to do what we're doing. someone please help me- I'm a 7th grader doing 8th grade math and my head is on the verge of exploding-
Answer:
Is there specific topic/topics you are working on?
Also, if you are struggling Khan Academy has some informative videos all you have to do is search up a topic on their site and a video will come up with practice questions to try after the video as well!
good luck on your test!!
A cheetah runs with an average speed of 32 m/s for 30 seconds. How far did the cheetah run?
Answer:
o.2m.
s=av/t where av= average speed and s= speed and t= time
The cheetah ran 960 meters in 30 seconds with an average speed of
36 m/s.
What is a numerical expression?A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.
We know, distance = speed×time or d = st.
Given, A cheetah runs with an average speed of 32 m/s for 30 seconds.
Here, s = 32 m/s and t = 30 seconds.
Therefore, d = 32×30 meters.
d = 960 meters.
learn more about numerical expressions here :
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what is the negative square root of 65 over 121
Answer:
-0.06663022932
Step-by-step explanation:
Answer:
-0.06663022
it can't be simplified, but this is the decimal form....
First to answer gets something good ;)
Answer:
should be the second one 75 + 20x <55 +44x
Which best describes how to subtract 6.45 from 81.3?
Align the numbers on the decimal point. Place a zero in the hundredths place of 81.3.
Subtract from right to left, regrouping as necessary
Align the digits of the numbers on the right-most digit.
Subtract from right to left, regrouping as necessary.
Align the digits of the numbers on the left-most digit
Subtract from right to left, regrouping as necessary
Align the numbers on the decimal point.
Subtract from left to right, regrouping as necessary
Answer:
Align the numbers on the decimal point. Place a zero in the hundredths place of 81.3. Subtract from right to left, regrouping as necessary.
Step-by-step explanation:
The Correction Observation is
Align the numbers on the decimal point. Place a zero in the hundredths place of 81.3. Subtract from right to left, regrouping as necessary.
What is Subtraction?To subtract is to take something or somethings away from a group. The group's total number of items decreases or becomes lower when we subtract from it. The components of a subtraction issue are the minuend, subtrahend, and difference.
Given:
subtract 6.45 from 81.3
For Subtraction
First, Align the numbers on the decimal point.
Then, Place a zero in the hundredths place of 81.3.
lastly , Subtract from right to left
Learn more about subtraction here:
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What is square root of 500
Answer: The answer is 22.36....
Step-by-step explanation:
1. In the diagram below, if m angle1=79^ , find the measure of each numbered angle.
The measure of angles ∠1, ∠4, ∠5, ∠and 8 will be 79°. The measure of angles ∠2, ∠3, ∠6, and ∠7 will be 101°.
What are supplementary angles?The supplementary angles are defined as when pairing of angles addition to 180° then they are called supplementary angles.
We have been given that m angle ∠1 = 79°,
To determine the measure of each numbered angle.
As per the property supplementary angles,
m∠1 + m ∠2 = 180°
79° + m ∠2 = 180°
m ∠2 = 180° - 79°
m ∠2 = 101°
If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal.
∠1 = ∠4 = 79°
∠2 = ∠3 = 101°
∠2 = ∠6 = 101°
∠4 = ∠5 = 79°
∠5 = ∠8 = 79°
∠6 = ∠7 = 101°
Thus, the measure of angles ∠1, ∠4, ∠5, ∠and 8 will be 79°. The measure of angles ∠2, ∠3, ∠6, and ∠7 will be 101°.
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Help me solve this problem please
Answer:
I think what you would do here is line them up from least to greatest, or greatest to least. Hope this helps! <3
Step-by-step explanation:
3 bananas cost $0.99. At this rate, how much do 5 bananas cost?
Answer:
1.65
Step-by-step explanation:
0.99/3 = .33
.33 x 5 = $1.65
Answer:
Five bananas will cost $1.65
The school cafeteria buys bottles of water for $0.75 each. They mark up the price 40%. How much do they sell water bottles for?
Answer:
$1.05
Step-by-step explanation:
Part/whole method:
[tex]\frac {a}{0.75} = \frac {140}{100}[/tex]
0.75·140=105
105÷100=1.05
Find the slope
5x - 2y = 10
M=_______
I need to figure this out in simplest form but I’m stuck
Answer:
z ≥ 2
Step-by-step explanation:
Step 1: Write inequality
-7z - (-5z - 4) ≤ -3z - 2 + 4z
Step 2: Solve for z
Distribute negative: -7z + 5z + 4 ≤ -3z - 2 + 4zCombine like terms: -2z + 4 ≤ z - 2Add 2z to both sides: 4 ≤ 3z - 2Add 2 to both sides: 6 ≤ 3zDivide both sides by 3: 2 ≤ zRewrite: z ≥ 2