Answer:
[tex] SE= \sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2}}[/tex]
And for this case if we have the same sample size we got the minimum value when we have the higher value fo n for each one and for this case would be the answer:
b. 120
Step-by-step explanation:
For this case we have the following info given:
[tex] n_1 = n_2 = 100[/tex]
[tex]\mu_1 = 85.6[/tex]
[tex]\mu_2 = 82.1[/tex]
[tex] \sigma_1 =12.4[/tex]
[tex]\sigma_2 = 8.9[/tex]
We assume that the variable of interest is the linear combination of the two means and for this case the standard error would be given by:
[tex] SE= \sqrt{\frac{\sigma^2_1}{n_1}+\frac{\sigma^2_2}{n_2}}[/tex]
And for this case if we have the same sample size we got the minimum value when we have the higher value fo n for each one and for this case would be the answer:
b. 120
How many different simple random samples of size 5 cab be obtained from a population whose size is 46
Answer:
1370754
Step-by-step explanation:
From what I can see, you are probably studying combinations and permutations at the moment. Since this is a question about how many groups of five can be produced from a sample size of 46, the groups are random and not in order, which may rule for us to use the combination formula.
Once you compute this, this answer is basically saying that 1370754 groups of 5 can be created from a sample size of 46
If I ride a bicycle at a rate of 5m/s,how long will it take me to ride a distance of 12km at the same rate?
Step-by-step explanation:
given,velocity = 5 m/s
and distance=12×1000=12000m
now,time =?
we have , v=s/t
or, t= s/v
so,t=12000/5
2400sec.....ans
=
what is the surface area of the prism shown to the left?
(idk the answer i guessed)
Answer:
828
Step-by-step explanation:
Missing leg of triangle:
√15²-12²= √225-144=√81=9
Triangle faces= 2*1/2*12*9= 108
Base= 20*9= 180
Front face= 20*15= 300
Back face= 20*12= 240
Total= 108+180+300+240= 828
Second choice
Copy the diagram and oaloulate the sizes of
a bº and cº. What is the sum of the angles of
the triangle?
Answer:
sum of the angles of the triangle are 180°
Step-by-step explanation:
To find the sum of the interior angles, we use the formula( s-2*180), where s is the number of sides of the shape. If it is a pentagon, 5-2*180= 3*180= 540,
which shows that the sum of the interior angles of a pentagon is 540.
since, it is a triangle in the figure with 3 sides, 3-2*180=1*180=180.
The interior angles are unknown= a, b and c. we know that a+b+c=180 degrees and the exterior angles are mentioned. And we know that, opposite angles are equal. So, a is 40 degrees considering that 40 degrees is the opposite angle of a, b is 95 degrees whereas c is 45 degrees.
now, lets check if the angles indeed have a sum of 180 degrees,
40+95+45= 135+45 which gives 180 degrees.
Answer:
180°
Step-by-step explanation:
→ Angles in a triangles always add up to 180, we can prove this by calculating a, b and c so,
a = 40° (vertical angles are equal)
b = 95° (vertical angles are equal)
c = 45° (vertical angles are equal)
40 + 45 + 95 = 85 + 95 = 180°
Rachel has completed 2/3 of her shift; Jose has completed 1/6 of his shift; Damon has finished 4/5 of his shift; and Stacy has 6/7 of her shift remaining. Out of the four employees, who has completed the most work time? A. Damon B. Rachel C. Stacy D. Jose
Answer:
C. Stacy
Step-by-step explanation:
One way to compare is to convert all the fractions into decimals
Rachel works 2/3 of her shift: Approximately= 0.667
Jose works 1/6: approx. = 0.1667
Damon works 4/5= 0.80
Stacy works 6/7: approx. = 0.8571
Now this makes it much easier to compare
And since 0.85714 (Stacy's shift) is the largest number, Stacy has completed the largest portion of her shift
Which of the following statements is false regarding randomization?
Answer:b
Step-by-step explanation:
A binomial probability experiment is conducted with the given parameters. Use technology to find the probability of x successes in the n independent trials of the experiment. n=9, p=0.45, x<4
Answer:
The probability of successes P( x < 4 ) = 0.36138
Step-by-step explanation:
Step(i):-
Given 'n'=9
The probability of success 'p' = 0.45
q = 1-p = 1-0.45 = 0.55
Let 'X' be the random variable in Binomial distribution
[tex]P(X=r) = n_{C_{r} } p^{r} q^{n-r}[/tex]
[tex]n_{C_{r} } = \frac{n!}{(n-r)!r!}[/tex]
Step(ii):-
The probability of x successes in the n independent trials of the experiment
[tex]P(x<4) = P(x=0) +P(x=1)+P(x=2)+P(x=3)[/tex]
= [tex]= 9_{C_{0} } (0.45)^{0} (0.55)^{9-0}+9_{C_{1} } (0.45)^{1} (0.55)^{9-1}+9_{C_{2} } (0.45)^{2} (0.55)^{9-2}+9_{C_{3} } (0.45)^{3} (0.55)^{9-3}[/tex]By using factorial notation
[tex]n_{C_{r} } = \frac{n!}{(n-r)!r!}[/tex]
[tex]9_{C_{0} } = 1 , 9_{C_{1} } = 9 , 9_{C_{2} } = 36, 9_{C_{3} } = 84[/tex]
P( x < 4 ) = (0.55)⁹ + 9(0.45) (0.55)⁸ + 36 (0.45)² (0.55)⁷ +84 (0.45)³ (0.55)⁶
P( x < 4 ) = 0.004605+0.03391 + 0.1109855+ 0.21188
P( x < 4 ) = 0.36138
Final answer:-
The probability of successes P( x < 4 ) = 0.36138
Tammy and Lawrence like to bike competitively. Tammy biked seven less than three times the number of miles that Lawrence biked. If c represents the number of miles Lawrence biked, write an expression for the number of miles Tammy biked.
Answer:
3c - 7
Step-by-step explanation:
c - the number of miles Lawrence biked
Tammy biked seven less than three times the number of miles that Lawrence biked.
So, 3 x c (the # of miles Lawrence biked) - 7 (she biked seven less)
The answer is 3c - 7.
A 6-digit number has at least one even digit in its record. How many such numbers are there? (0 is an even digit)
Answer:
884,375
Step-by-step explanation:
The first digit can't be 0, so there are 9×10⁵ = 900,000 possible six-digit numbers.
Of those, the number of six-digit numbers that have only odd digits is 5⁶ = 15,625.
Numbers with at least one even digit are all numbers that don't have only odd digits. So the number of six-digit numbers with at least one even digit is:
900,000 − 15,625 = 884,375
use the drop downs to identify the domain and range of the following relation.
{(-4, -7), (0, 6), (5, -3), (5, 2)}
Answer:Domain is x and range is y.For ex:-4 is domain and -7 is range.
Step-by-step explanatioFeel pleasure to help u:
Domain ( -4, 5) Range ( -7, 6)
The Domain includes the numbers between the least and the greatest x-values.
The range includes the numbers between the lowest and the highest y-values.
simply expression 1+5v+v
Answer:
1 + 6v
Step-by-step explanation:
1+5v+v
Combine like terms
1 + 6v
Answer:
6v + 1
Step-by-step explanation:
1 + 5v + v
Apply rule : a = 1a
1 + 5v + 1v
Combine like terms.
5v + 1v + 1
(5 + 1)v + 1
(6)v + 1
6v + 1
What is the measure of angle S?
480
56°
930
101°
Answer:
m∠s = 93°
Step-by-step explanation:
We know that any quadrilateral's sum of angles adds up to 360°. In that case,
360 - (56 + 132 + 79) = m∠s
m∠s = 93°
Answer:
S° = 93 °
Step-by-step explanation:
[tex]The- diagram- is- a- trapezoid (quadrilateral)\\Sum- of- angles-in a- quadrilateral = 360\\ 132\° + 56\° + 79\° + x\° = 360\° \\267\° + x\° = 360\° \\x = 360 \° - 267 \° \\x\° = 93\°[/tex]
Please answer question now
Answer:
∠CED
or
∠DEC
its the same thing
Step-by-step explanation:
E is the angle
There are 4 Board of Directors positions open. 2 will be for men, 2 will be for women.
Out of 20 candidates, 11 are men, 9 are women. How many total outcomes are
possible?
Answer:
4290
Step-by-step explanation:
Lets find the total number of men and women .
9 women are out and 2 became the member of the Board=> total 11 women
11 men are out and 2 became the member of the Board=> total 13 men
11 women-candidates for 2 positions can make C11 2 outcomes =11!/(11-2)!/2
13 men-candidates for 2 positions can make C13 2 outcomes= 13!/(13-2)!/2
The total number of outcomes is C11 2 *C13 2 = 13!*11!/9!/11!/2/2=
10*11*12*13/2/2=11*13*5*6=4290 outcomes
What is jc ? (Picture included)
Answer:
jc is 40 i think
Step-by-step explanation:
Answer:
40(Maybe)
Step-by-step explanation:
I'm not 100% sure that 40 is correct but I'm pretty sure it is.
Please answer this correctly
Answer:
1/9
Step-by-step explanation:
first, u need 9 ---> 1/3
then u need 8 ---> 1/3 also
Multiply them and get...1/9
It is known that 10% of the calculators shipped from a particular factory are defective. What is the probability that exactly three of five chosen calculators are defective
Answer:0.0081 or 0.81%
Step-by-step explanation:
The required probability is P(3,5,0.1)= C5 3 * p^3*q^2, where
C5 3= 5!/3/2=4*5/2=10
p is the probability that one randomly selected calculator is defective= 10%=0.1
q is the probability that one randomly selected calculator is non-defective.
q=1-p=1-0.1=0.9
So P(3,5,0.1)= 10*0.1^3*0.9^2=0.01*0.81=0.0081
Melvin has game and education apps on his tablet. He noticed that he has 3 game apps for every 2 education apps. Which of the following is another way to write this ratio? 1:2 2:1 2:3 3:2
3:3
Answer:
3: 2
Step-by-step explanation:
game Apps: education apps:
3: 2
In Triangle A B C, what is the value of x? Triangle A B C. Angle A is (10 x minus 10) degrees, angle B is (8 x) degrees, angle C is (10 x + 8) degrees. 5.5 6.5 55 65
Answer:
x = 6.5
Step-by-step explanation:
The sum of the angles of a triangle is 180
8x+ 10x-10 + 10x +8 = 180
Combine like terms
28x -2 = 180
Add 2 to each side
28x-2+2 = 180+2
28x=182
Divide by 28
28x/28 = 182/28
x =6.5
Answer:
x = 6.5
Step-by-step explanation:
In a triangle, the sum of the measures of the angles equals 180 deg.
8x + 10x - 10 + 10x + 8 = 180
28x -2 = 180
28x = 182
x = 6.5
Two identical decks of 52 cards are mixed together, yielding a stack of 104 cards. How many different ways are there to order this stack of 104 cards?
Answer:
here the order will be 104! =[tex]1.029e^{166}[/tex]
Step-by-step explanation:
since the cards are to arranged in no particular order that is why we used combination to find the result.
Combination can simply be explained as the method of selecting items from a collection of items where the order of the selections does not matter.
Justin solved 15 problems of the recent math quiz. His classmate Jordan solved 3 more problems than Justin. Another classmate of Justin, Jeremy also solved some problems and they all together solved 37 problems. Who solved the most number of problems?
Answer:
Jordan
Step-by-step explanation:
Problems solved by Jordan = 15 + 3 = 18
Total problems solved = 37
Problems solved by Justin + problems solved by Jordan + problems solved by Jeremy = 37
15 + 18 + problems solved by Jeremy = 37
33 + problems solved by Jeremy = 37
Problems solved by Jeremy = 37 - 33
Problems solved by Jeremy = 4
So, Jordan solved most number of problems
Answer:
Jordan solved the most number of problems.
Step-by-step explanation:
Justin solved 15 problems
Jordan solved 15+3 = 18 problems
Jeremy solved 37 - (15+18) = 37 - 33 = 4 problems
Given the equation A=250(1.1)t, you can determine that the interest is compounded annually and the interest rate is 10%. Suppose the interest rate were to change to being compounded quarterly. Rewrite the equation to find the new interest rate that would keep A and P the same. What is the approximate new interest rate? Convert your answer to a percentage, round it to the nearest tenth, and enter it in the space provided, like this: 42.53%
Answer:
[tex]r \approx 2.41\%[/tex]
Step-by-step explanation:
The computation of the approximate new interest rate is shown below:
As we know that there are four quarters in a year so
The new equation is
[tex]A = 250(1 + r)^{4t}[/tex]
Now to determine the value of interest rate,i.e r, so place this to the first equation.
So,
[tex]250(1.1)^{t} = 250(1 + r)^{4t}[/tex]
[tex]1.1^{t} = (1 + r)^{4t}[/tex]
1.1 = (1 + r)^4
[tex]\sqrt[4]{1.1} = 1 + r[/tex]
[tex]r = -1 + \sqrt[4]{1.1}[/tex]
[tex]r \approx 0.0241[/tex]
[tex]r \approx 2.41\%[/tex]
We simply applied the above formula so that the interest rate could come
In a certain city, the true probability of a baby being a boy is 0.559. Among the next eight randomly selected births, find the probability that at least one of them is a boy. (round to three decimal places)
Answer:
99.86%
Step-by-step explanation:
What we have here is a binomial distribution, let x be the baby number among 8 births.
Binomial (n = 8, p = 0.559)
We want to find, P (X ≥ 1)
P (X ≥ 1) = 1 - P (X <1)
P (X ≥ 1) = 1 - P (X = 0)
P (X = 0) = 8C0 * (0.559) ^ 0 * (1 - 0.559) ^ (8-0)]
8C0 = 8! / (0! * (8-0)!) = 1
replacing we have:
P (X = 0) = 1 * 1 * 0.0014
P (X = 0) = 0.0014
P (X ≥ 1)) = 1 - 0.001 4
P (X ≥ 1) = 0.9986
Therefore the probability is 99.86%
i will give brainliest and 50 points pls help ASP
Answer:
Step-by-step explanation:
A trapezoid and two rectangulars are in the opening form of the geometric shapes and you should calculate their surface areas seperately which is:
12 cm and 30 cm first rectangular and its surface area is 12 x 30 = 360 cm^2second rectangular has 30 cm and 26 cm and 30 x 26 = 780 cm^2A trapezoid surface area is = [(24+29) /2] * 25 = 662.5 cm^2total surface area = 360 + 780 + 662.5 = 1802.5Answer:
Total surface area = 3744 cm^2
Step-by-step explanation:
All linear measurements are in cm
Surface area of BOTH bases
Ab = 2* (12+29)*24/2
= 984
Circumference of base
Cb = (25+12+26+29)
= 92
Height of prism
H = 30 (given)
Surface area of sides of prism
As= Cb*H
= 2760
Total Surface area of Prism
A = Ab + As
= 984 + 2760
= 3744 cm^2
Which number is equivalent to [tex]\frac{3^4}{3^2}[/tex]?
A. 2
B. 9
C. 81
D. 729
Answer:
B. 9
Step-by-step explanation:
When there are exponents with the same base in a fraction, they can be simplified by subtracting.
We can take out 2 on both the top and bottom, leaving us with 3^2 over 1
3x3 is 9 and 9/1 is still 9
Answer:
9
Step-by-step explanation:
Since the bases are the same, we can subtract the exponents to accomplish the division
a^b / a^c = a^ (b-c)
3^4 / 3^2
3^ (4-2)
3^2
9
helpppppppppppppppppppppppp pleaseeeeeeeeeee
Answer:
6 stickers
Step-by-step explanation:
84/14 =6
Answer:
6 stickers each
Step-by-step explanation:
have a great day
How do I calculate velocity?
Answer:
v = Δs/Δt
Step-by-step explanation:
Velocity is equal to the displacement/distance (delta symbol s) over the change of time (delta symbol t).
what 4.2 times 0.7 /a is 294 /b is 2.94 /c 29.4
Answer:
29.4
Step-by-step explanation:
Answer:
2.94
Step-by-step explanation:
4.2 × 0.7 = 2.94
Quadrilaterals WXYZ and BADC are congruent. In addition, WX ≅ DC and XY ≅ BC.
If AD = 4 cm and AB = 6 cm, what is the perimeter of WXYZ?
18 cm
20 cm
22 cm
24 cm
Answer: 20 cm
If quadrilaterals WXYZ and BADC are congruent, then their corresponding sides are congruent.
Given that
WX≅DC,
XY≅BC,
you can state that
YZ≅AB,
WZ≅AD.
If AD = 4 cm and AB = 6 cm, then WZ = 4 cm and YZ = 6 cm. Opposite rectangle sides are congruent, then XY = 4 cm and WX = 6 cm.
The perimeter of WXYZ is
P = WX + XY + YZ + WZ = 6 + 4 + 6 + 4 = 20 cm.
algebra ...........................
Answer:
see explanation
Step-by-step explanation:
Given that y is inversely proportional to x then the equation relating them is
y = [tex]\frac{k}{x}[/tex] ← k is the constant of proportion
(a)
To find k use the condition when y = 7 , x = 9, that is
7 = [tex]\frac{k}{9}[/tex] ( multiply both sides by 9 )
63 = k
y = [tex]\frac{63}{x}[/tex] ← equation of proportion
(b)
When x = 21, then
y = [tex]\frac{63}{21}[/tex] = 3