Answer:
438,800,000
Step-by-step explanation:
The number 438 million comes first, so put 438 and then a comma.
The number 800 thousand is next, so put 800 and then a comma.
There is no number for the hundreds, tens, and ones place, so put 000 with no comma after, like this.
438,800,000An analytical laboratory is asked to evaluate the claim that the concentration of the active ingredient in a specimen is 86%. The lab makes 3 repeated analyses of the specimen. The sample mean result is 0.8708. The true concentration is the mean m of the population of all analyses of the specimen. The standard deviation of the analysis process is known to be LaTeX: \sigmaσ = 0.0068. Is there significant evidence at the 1% level that LaTeX: \muμ is different than 0.86? (assume normality)
Answer:
Decision rule
Reject null hypothesis
Conclusion
There is significance evidence that the true mean is different from 0.86
Step-by-step explanation:
From the question we are told that
The population mean [tex]\mu = 0.86[/tex]
The sample is mean is [tex]\= x = 0.8708[/tex]
The standard deviation is [tex]\sigma = 0.0068[/tex]
The level of significance is [tex]\alpha = 0.01[/tex]
The sample size n = 3
The null hypothesis is [tex]\mu = 0.86[/tex]
The alternative hypothesis is [tex]\mu \ne 0.86[/tex]
Generally the test statistics is mathematically represented as
[tex]z = \frac{\= x - \mu }{ \frac{\sigma}{\sqrt{n} } }[/tex]
=> [tex]z = \frac{ 0.8708 - 0.86 }{ \frac{0.0068}{\sqrt{3} } }[/tex]
=> [tex]z = 2.751 [/tex]
Generally p- value is mathematically represented as
[tex]p-value = 2 P(z >2.751 )[/tex]
From the z-table
[tex]P(z >2.751 ) = 0.0029707[/tex]
So
[tex]p-value = 2 * 0.0029707[/tex]
=> [tex]p-value = 0.00594 [/tex]
From the obtained question we see that [tex]p-value < \alpha[/tex]
Hence we reject the null hypothesis
Annabelle lives at Bermondsey in London. She has to speak at a conference in Birmingham at 10.30am.
It will take her an hour from her home to get to Euston Rail
Station, from where she will get a train to Birmingham.
The train journey from Euston
to Bimingham is an hour and 10 minutes.
Trains to Birmingham run at the following times: 5 minutes past the hour, 25 minutes past the hour and 45 minutes past the hour.
The meeting venue in Birmingham is a 5-minute walk from the station.
What is the latest time that Annabelle can leave home, if she is to make it on time for
the meeting in Birmingham ?
Show your work.
HELP ME PLEASE!!!
DUE TODAY. THANK YOU SO MUCH.
Answer:
The conference in Birmingham is at 10.30am.
She has to leave at 08.00 am from her home.
Step-by-step explanation:
Because
• Time to get Euston Rail Station is 1 hour so she will be at station at 09.00 am.
• Trains to Birmingham run at the following times: 5 minutes past the hour, 25 minutes past the hour and 45 minutes past the hour. Which means she will get the train at 9.05 am.
• The train journey from Euston to Birmingham is an hour and 10 minutes so she will reach Birmingham station at 10.15 am.
• She will reach the meeting venue in Birmingham at 10.20 am as there is a 5-minute walk from the Birmingham station to meeting venue.
She will reach to meeting time 10 minutes earlier which will allow here to get ready for the meeting.
Note:
If we want to overcome the 10 minutes and she live 8.10 am from here home then she will reach to station at 9.10 am. According to the train timing she will get train at 09.25 am which means at the end she will get late about 10 minutes to reach the venue for the meeting.
Holly has 38 pecans. She has 5 friends coming to visit. If Holly and her five friends each eat an equal number of pecans, about how many pecans will each person eat?
Answer: The answer is 6.3
Find the minimum sample size n needed to estimate μ for the given values of c, σ, and E. c=0.98, σ=8.7, and E=
Answer:
The sample size n will be "52".
Step-by-step explanation:
The given values are:
c = 0.98
σ = 8.7
Margin of error
E = 2
[tex]Z_{\frac{\alpha}{2} }=Z_{\frac{0.1}{2} }=1.65[/tex]
For 90% confidence level:
⇒ [tex]n=[\frac{Z_{\frac{\alpha}{2}}\times \sigma}{E} ]^2[/tex]
⇒ [tex]=[\frac{1.65\times 8.7}{2} ]^2[/tex]
⇒ [tex]=51.5165[/tex]
i.e.,
⇒ [tex]n=52[/tex]
I need help!! Thank you
Answer:
A. is correct so, -5
Step-by-step explanation:
Have a good day.
Office Mac purchases packs of pencils from the Manufacturer for $2.00 and applies a mark-up of 40%. How much do they actually sell the pencils for?
a. $2.00
b. $0.80
c. $2.80
d. $1.20
Answer:
the answer is b
Step-by-step explanation:
because
mark-up= profit
cost * 100%
making it:
40% = 0.80
2.00 * 100%
7th grade mathhh help me plzzz
Answer:
40 degrees
Step-by-step explanation:
Answer:
40°F
Step-by-step explanation:
If you add 15 to -15 it's 0 and if you add another 15 that's 15 and if you add a 10 it brings it up to 25.
Mary paid $349.99 for 6 patio chairs. How much did each chair cost her?
Answer:
Are you serious?
Step-by-step explanation:
That's pretty much unanswerable.
Answer:
$58.33 per chair
Step-by-step explanation:
graph the line 8x + 2y =16
Answer:
use Desmos its a graphing calculator
Step-by-step explanation:
Which situation can be represented by the inequality 155 > 12x + 100 ?
Juanita saves $15 each week. Dan has already saved $100 and saves $12 each week. When
will Juanita have less money than Dan?
O Juanita saves $12 each week. Dan has already saved $100 and saves $15 each week. When
will Juanita have less money than Dan?
Juanita saves $15 each week. Dan has already saved $100 and saves $12 each week. When
will Juanita have more money saved than Dan?
Juanita saves $12 each week. Dan has already saved $100 and saves $15 each week. When
will Juanita have more money saved than Dan?
No
Answer:
What is the denotative meaning of “electrified fence”?
✔ a fence with an electric current
What is the connotative meaning of “electrified fence” in the passage?
✔ something dangerous and painful
What does the use of this phrase reveal about how the author views communism?
✔ She believes that communism is oppressive.
Step-by-step explanation:
trast me that the right answerIn a chemistry lab, each of the 49 students need 80ml of acid. How many 1 l bottles of acid need to be ordered?
Answer:
49x0.08= 3.92 l
Step-by-step explanation:
so, you must order 4 bottles
Answer:
4 bottles
Step-by-step explanation:
49×0.08=3921
find the value of each missing variable.
Answer:
The value of x is 17 and that of y is 8.
Answer:
x=17 y=8
Step-by-step explanation:
PLEASE HELP AGAIN ?! stuck :(
Write a compound inequality for the graph shown below. Use z for your variable.
Answer:
wat happened to yoi
are u fine
A florist sells a dozen roses for $35.40. She sells individual roses for the same unit cost. Write an equation to represent the relationship between the number of roses, x, and the total cost of the roses, y. How much would 18 roses cost?
Answer: The equation is
The cost of 18 roses is 53.10.
Step-by-step explanation:
Given:
A florist sells a dozen roses for 35.40. She sells individual roses for the same unit price.
Now, to find the cost of 18 roses and write an equation to represent the relationship between the number of roses, x, and the total cost of the roses, y.
1 dozen = 12.
Now, to get the cost of 18 roses we use unitary method:
If 12 roses cost = 35.40.
So, 1 roses cost = 2.95.
Thus, 18 roses cost = 53.10.
Therefore, the cost of 18 roses = 53.10.
Now, to write an equation the relationship between the number of roses and the total cost of the roses:
Cost of per rose = 2.95.
As, given in question:
Number of roses =
Total cost of the roses =
Total cost of the roses = Cost of per rose × Number of roses.
So, the equation is:
Therefore, the equation is And the cost of 18 roses is 53.10.
Simplify:
(7 + 2i)(9 - 6I)
Answer:
27
Step-by-step explanation:
hope this helped <3
Steven bought nuts last week, consisting of 3.37 pounds of cashews, 2.6 pounds of almonds, and peanuts that weighed 7.89 pounds. What is the total weight, in pounds, of the nuts that Steven bought last week?
Answer:
13.86 pounds
Step-by-step explanation:
3.37 + 2.6 = 5.97
5.97 + 7.89
= 13.86
Hope this helps!!
Which expression correctly represents “six more than the product of five and a number, decreased by one”?
6 + 5 n minus 1
6 + 5 + n minus 1
6 + 5 (n minus 1)
(6 + 5) n minus 1
Answer:
its b
Step-by-step explanation:
y-3=2(x+1) please please help
Answer:
y=2x+5
Step-by-step explanation:
distribute 2 to x and 1, do this by multiplying each.
you should get y-3=2x+2.
then you have to move the -3 from the left to the right. but when you do this you have to change the -3 to a positive 3. then combine 3 and 2.
you then get the answer, y=2x+5.
Write an equation in slope-intercept form that is parallel to y=2x-5 and
passes through (3,4) *
Step-by-step explanation:
An equation in slope intercept form that is parallel to y=2x-5 is y=2x-2
Which expression represents “3 more than twice a number”?
Answer:
I think the answer is this 2x+3
Every year, the population of a small town doubles. It starts off with 150 people. How many people are in the town in 7 years?
Answer:
1050
Step-by-step explanation:
Multiply 150 by 7
Complete each statement from the information given and state the reasons and the triangle criterion you used. If the triangles cannot be shown to be congruent, leave the box for the second triangle blank and chose for reason “Cannot be determined.”
Answer:
BOY=MAN because of ASA
Step-by-step explanation:
There is an angle in one corner and another corner also has a angle the last side is in the middle
Answer:
asa
Step-by-step explanation:
If your car gets 28 miles per gallon and you travel 30 miles round-trip to work five days a week, how much do you pay each 4-week
month if gas is $3.05 a gallon? (Round your answer to 2 decimal places.)
please help
Answer:
You'd pay $65.35 every 4 weeks
Step-by-step explanation:
First you have to gather all the miles.
30 miles x 5 = 150
So that is 150 miles/per week
Then you have to devide the miles by how many gallons per gas you travle.
150/28 miles per gallon = 5.3571....
That how many gallons you'll need a week.
Now, you times the gallons by the price of the gas
5.3571... x $3.05 = $16.3392...
Finally you times the amoutn of money for a week time 4 weeks.
$16.3392... x 4 = $65.35 (to the two decimal mark)
Hope this helped you! : )
inverse of a*b=ab/2
ab/2=a*b
i think if not please let me know
ny
10 Instructor-created question
10
For the functions f(x)= - 6x +9 and g(x) = 7x + 9 find the following.
09
(a) (fog)x)
Ur (b) (g of)(x)
nalty 25 (a) (fog)(x)=(Simplify your answer.)
tions: 10
(b) (gof)(x)=(Simplify your answer.)
I’m very sorry but I don’t understand
Step-by-step explanation:
Similar triangles can have congruent angles and congruent sides.
True or false
Answer:
True
Step-by-step explanation:
I had the same question on my test :)
(Reason why it's true)
Similar triangles can have the S.A.S (Side, angle, side). They can even.
Answer:
True!
Step-by-step explanation:
Ill MARK BRAINLIST PLS HELP !!!
Answer:
This question is pretty simple, half the values given are just to confuse you
notice that we are given a function which gives us the height of the rock at any given time, so if we use that function for t=2 seconds, we will get the height of the rock after 2 seconds
We are given the function:
h(t) = -16t² - 50t + 220
replacing t with 2
h(2) = -16(2)² - 50(2) + 220
h(2) = -16(4) - 100 + 220
h(2) = -64 - 100 + 220
h(2) = 56 feet
Therefore, the height of the rock 2 seconds after throwing is 56 m
The price of a Technology stock was $9.73 yesterday today the price Rose to $9.80 find the percentage increase round your answer to the nearest tenth of a percent
plz help me will give brainlyest
Answer:
1. x = independent variable: Age
y = dependent variable: Accidents
2. Age scale and Accidents scale
The scale for age ranges from 15 - 30 with the value of 5 difference between each number.
While the accidents scale ranges from 0 -1 with no difference in between.
3. In my opinion, the scatter plot looks as though it decreases in accidents once the age rises. As seen from the data shown.
Step-by-step explanation:
1) x is considered as the independent variable, while y is considered the dependent value.
2) There are two sets of scales, one for the x and the other for y. These scales are the values that are interpreted in order to show data of the graph, due to their number and various size(s).
3) If you were to draw a line through the graph, you can somewhat create the image that the line would go down into the right corner! Meaning that it is decreasing over time.
50 POINTS ASAP BRAINLIEST
State how many imaginary and real zeros the function has.
f(x) = x^3 + 5x^2 + x + 5
0 imaginary; 3 real
1 imaginary; 2 real
3 imaginary; 0 real
2 imaginary; 1 real
Answer:
1 real root 2 imaginary roots
Step-by-step explanation:
f(x) = x^3 + 5x^2 + x + 5
Set equal to zero to find the zeros
0 = x^3 + 5x^2 + x + 5
Factor by grouping
0 = x^2( x+5) + 1( x+5)
0 = (x+5) ( x^2+1)
Using the zero product property
x+5 =0 x^2+1 =0
x=-5 x^2 = -1
x=-5 x = ±i
1 real root 2 imaginary roots
Answer:
1 real root 2 imaginary roots
Step-by-step explanation:
f(x) = x^3 + 5x^2 + x + 5
Set equal to zero to find the zeros
0 = x^3 + 5x^2 + x + 5
Factor by grouping
0 = x^2( x+5) + 1( x+5)
0 = (x+5) ( x^2+1)
Using the zero product property
x+5 =0 x^2+1 =0
x=-5 x^2 = -1
x=-5 x = ±i
1 real root 2 imaginary roots