Answer:
υ= 25
Step-by-step explanation:
IF we have two small independent samples from two normal populations with means μ1 and μ2 and standard deviations σ1 and σ 2 but unknown ,then the unbiased pooled or combined estimate of the common variance sigma square ha s student's t distribution with degrees of freedom given by
υ= n1+ n2- 2
In the given question
Sample A size= n1= 12
Sample B size = n2= 15
υ= 12+15-2
υ= 25
where
sp²= (n1-1) s1² + (n2-1) s2² / n1+n2-2
Help me please help me I really need help
Answer:
44%
0.44 is 44% of 1.
) How is the Domain for the function f(x) = (x restricted?
Please help me with my work (no links)
Answer:
1,044(sqrd)
Step-by-step explanation:
18*18=324cm(sqrd)
18*20= 320
320/2= 180cm(sqrd)
180*4= 720cm(sqrd)
720+324= 1,044(sqrd)
A rectangle measures 3cm by 4cm.What is the length of its diagonal ?
Answer:
5cm
Step-by-step explanation:
Given data
Length= 3cm
Width= 4cm
Applying Pythagoras theorem
z^2= x^2+y^2
z^2= 3^2+ 4^2
z^2= 9+16
z^2= 25
square root both sides
z= √25
z= 5cm
Hence the diagonal is 5cm
Milk is sold 1/2 pint bottles
Answer:
in the photo
SORRY IF BAD HANDWRITING
Find the volume of the solid below.
Answer: V≈116.19
Click the link and it will show you how you find your answer
If r = 5 z then 15 z = 3 y, then r =
1. y
2. 2y
3. 4y
4. 10y
5. 15y
Answer: R = Y
Step-by-step explanation: I'm going to assume that this is your problem:
If r = 5z and 15z = 3y, then r = ?
r = 5z
Multiply both sides of this equation by 3:
3r = 15z
Now, we know that
3r = 15z and that 15z = 3y
By the transitive property of equality, we can conclude that
3r = 3y
Dividing both sides by 3 yields this:
MRP of pen drive is reduced from rupees 872 rupees 580 find the present age reduction in price......my explain me step by step.....
Answer:
the money reducted = 1870 - 580
= 1290
now the percentage = 1290/1870 x 100
= 68.9%
Step-by-step explanation:
Answer:
Step-by-step explanation:
the money reducted = 1870 - 580
= 1290
now the percentage = 1290/1870 x 100
= 68.9%
a grab bag contains 20 packages worth $0.70 each 15 packages $0.60 each and five packages worth 30 cents each what is the expected value if you have to pay fifty cents each to pick one package at random
Answer:
The expected value is $0.1125
Step-by-step explanation:
The number of packages worth $0.70 in the grab bag = 20
The number of packages worth $0.60 in the grab bag = 15
The number of packages worth 30 cents in the grab bag = 5
The amount paid to pick one package = 50 cents
The number of packages in the bag, n = 20 + 15 + 5 = 40
The total value of the packages in the grab bag, 'V', is given as follows;
V = 20 × $0.70 + 15 × $0.60 + 5 × $0.30 = $24.5
The average value of the packages in the bag, A = V/n
∴ A = $24.5/40 = 0.6125
The expected value is the value of the investment, at a point in time, the expected value E(X) is found by finding the sum of the of the calculations of the possible outcomes as follows
Whereby a $0.70 package is picked up, we have;
E(X)₁ = ($0.70 - $0.50) × 20/40 = $0.10
Whereby a $0.60 package is selected, we have;
E(X)₂ = ($0.60 - $0.50) × 15/40 = $0.0375
Whereby a $0.30 package is selected, we have;
E(X)₃ = ($0.30 - $0.50) × 5/40 = $(0.025)
Therefore, the expected value, E(X), is found as follows;
E(X) = E(X)₁ + E(X)₂ + E(X)₃
E(X) = 0.1 + 0.0375 - 0.025 = $0.1125
The expected value, E(X) = $0.1125
Skylar just got hired for a new job and will make \$61,000$61,000 in her first year. Skylar was told that she can expect to get raises of \$2,500$2,500 every year going forward. How much money in salary would Skylar make in her 6th year working at this job?
Answer:
$73,500
Step-by-step explanation:
It takes one student 10 hours to wash all the cars at a car wash. If 4 students wash all the cars, how many hours will each person spend washing cars? (assume that all students wash cars at the same rate.)
a. 2.5 hrs
b.40 hrs
c.5 hrs
d. 0.4 hrs
Answer:
A
Step-by-step explanation:
Each student spend 0.625 hours to wash all the cars.
What is unity method?
The unitary method is a strategy for problem-solving that involves first determining the value of a single unit, then multiplying that value to determine the required value.
How much time spent by each student to wash cars?All the cars are washed by 1 student in 10 hours.
So, the time taken by 4 students to wash all the cars will be 10/4=2.5 hours.
This includes that 4 students wash all the cars in 2.5 hours.
So, the time invested by each student to wash cars is 2.5/4=0.625.
Therefore, each student spend 0.625 hours.
Disclaimer:
It takes one student 10 hours to wash all the cars at a car wash. If 4 students wash all the cars, how many hours will each person spend washing cars? (assume that all students wash cars at the same rate.)
a. 2.5 hrs
b.0.625 hrs
c.5 hrs
d. 0.4 hrs
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4 A roll of paper is shown below.
Tube
About how much cardboard is needed to make the inner tube for a roll of paper if the tube
has a diameter of 4.5 cm and is 24 cm long?
F 339 cm2
G 679 cm2
H 371 cm2
J
382 cm2
Answer:
339 cm²
Step-by-step explanation:
Using the relation for the surface area of a cylinder :
A = 2πrh
r = Radius = diameter / 2 = 4.5 / 2 = 2.25 cm
Height, h = 24 cm
A = 2 * 22/7 * 2.25 * 24
A = 339.29200 cm²
Surface Area =339 cm²
About 339cm³ of cardboard will be needed for the inner tube.
To make inner tube card board needed is 339 cm² of the material.
What is Surface area ?The surface area of a solid object is a measure of the total area that the surface of the object occupies.
Here, diameter = 4.5 cm
then, radius = 4.5/2 = 2.25 cm
height = 24 cm
Surface area = 2πrh
= 2 X 3.14 X 2.25 X 24
= 339.12 cm²
Thus, to make inner tube card board needed is 339 cm² of the material.
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Tonya has $2000 in savings. She wants to save more money. She is considering two options:
• Plan A: Increase her balance by $1,000 every year
• Plan B: Increase her balance by 20% every year.
How much more money will she save with plan B after 10 years when compared to Plan A
(B)
(A) $383
(C) $12,000
$9,562
$12.383
(D)
figure b is scaled copy of figure a
Answer:
true
Step-by-step explanation:
multiply by 3
I go to a baseball field and survey the people in the stands, asking what is your favorite sport. Is this a fair sample of people for the survey?
Answer:
No.
Step-by-step explanation:
If you go to a baseball park and ask what their favorite sport is most will probably say baseball. Just as if you go to a basketball court, most would respond with basketball as their favorite sport. I suggest not going to anything related to sports and asking random people.
When deciding on an outfit, Alex can choose from 3
pairs of shoes, 3 pairs of pants, and 6 shirts. How many
different outfits are possible, if Alex chooses exactly 1
pair of shoes, 1 pair of pants, and 1 shirt?
F. 136
G. 54
H. 36
J. 15
K. 12
Answer:
54
Step-by-step explanation:
3*6*3=54
The solution is Option G.
The number of ways of choosing exactly 1 pair of shoes, 1 pair of pants, and 1 shirt is given by combination C = 54 ways
What are Combinations?The number of ways of selecting r objects from n unlike objects is:
ⁿCₓ = n! / ( ( n - x )! x! )
where
n = total number of objects
x = number of choosing objects from the set
Given data ,
Let the number of ways of choosing exactly 1 pair of shoes, 1 pair of pants, and 1 shirt be C
Now , the equation will be
The total number of shoes = 3 pairs
The total number of pants = 3 pairs
The total number of shirts = 6 shirts
And , the number of ways of choosing exactly 1 pair of shoes, 1 pair of pants, and 1 shirt is calculated by Combination , where
The number of ways of selecting 1 pair of shoes = ³C₁
The number of ways of selecting 1 pair of pants = ³C₁
The number of ways of selecting 1 shirt = ⁶C₁
So , the total number of ways = ³C₁ x ³C₁ x ⁶C₁
On simplifying the equation , we get
The total number of ways C = 3 x 3 x 6
The total number of ways C = 54 ways
Hence , the combination is C = 54 ways
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Joseph made a scale drawing of an Italian restaurant. The scale he used was 1 millimeter : 6 meters. The restaurant's kitchen is 24 meters long in real life. How long is the kitchen in the drawing
Answer:
4mm
Step-by-step explanation:
Joseph made a scale drawing of an Italian restaurant. The scale he used was 1 millimeter : 6 meters.
From the above question, our scale factor is given as:
1 millimeter : 6 meters.
1 mm = 6 m
Which also means
6m = 1 mm
The restaurant's kitchen is 24 meters long in real life. How long is the kitchen in the drawing?
Hence, we can calculate this as
6m = 1 mm
24 m = x mm
Cross Multiply
6 m × x mm = 24m × 1 mm
x mm = 24m × 1 mm/6m
x mm = 4 mm
Therefore, the length of the kitchen in the drawing is 4mm
morefreeepointshaveagoodday
Answer:
thanks
Step-by-step explanation:
really appreciate it
Answer:
Thank youu!
Step-by-step explanation:
hope you have a great day too!
The temperature outside is -4 degrees. If it drops 5 degrees during the night, what will the
temperature be?
Answer:
-9
Step-by-step explanation:
what is the slope if the 2 points (-5,4) (7,-6)
Answer:
-5/6
Step-by-step explanation:
y2 - y1 / x2 - x1
-6 - 4 / 7 - (-5)
-10 / 12
= -5/6
In a class of 50 students, the number of students who offer accounting is twice as the number who offer economics.10 students offer neither of the subject and 5 students offer both subject. (i)illustrate the information on a Venn diagram. (ii) how many students offer accounting? (iii) how many students offer economics? (iv)how many students offer only 1 subject?
The Venn diagram shows that the number of students who offer accounting is 30.
How to explain the Venn diagram?It should be noted that a Venn diagram is an illustration which uses circles to show the relationship between the objects.
The number of students who offer accounting is:
= 25 + 5
= 30
The number of students who offer Economics is:
= 10 + 5
= 15
The number of students who offer only one subject will be:
= 25 + 10
= 35
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If 2x + 6 = 5x, then 3x=
Answer: 3x=6
Step-by-step explanation: subtract 2x from both sides making it 6=3x and to find x just divide both sides by 3 and get x=2.
Hope this helps ^_^
The school auditorium can seat 325 students. In the auditorium there are 25 rows with the same number of seats in each row. Which equation can be used to find x, the number of seats in each row in the school auditorium?
to find how many seats are in each row you have to divide the nber of students by the rows 325 by 25 is 13 seats per row
6.5 cm
7.1 cm
7.1 cm
7.1 cm
7.1 cm
7.1 cm
7.1 cm
7.1 cm
7.1 cm
15.6 cm
15.6 cm
6.5 cm
Can someone give me the equation on this and or how to right it A number is 7 more than 5 times another number and their difference is 78 Find the numbers
Answer:
(x is number)
x=7>5
Step-by-step explanation:
hope this helps
Mr. Frankel bought 8 tickets to a puppet show and spent $30. He bought a combination of child tickets for #3 each and adult tickets for $5 each. How many adult tickets did Mr. Frankel buy?
How many adult tickets did he buy
please explain steps
Answer:
3 adult tickets and 5 children tickets.
Step-by-step explanation:
Make a chart:
1 adult + 7 children = 1(5)+7(3) = 26
2 adults + 6 children = 2(5)+6(3) = 28
3 adults + 5 children = 3(5)+5(3) = 30
4 adults + 4 children = 4(5)+4(3) = 32
5 adults + 3 children = 5(5)+3(3) = 34
6 adults + 2 children = 6(5)+2(3) = 36
7 adults + 1 child = 7(5)+1(3) = 38
The answer in bold is the only one that leads to $30, therefore he bought 3 adult tickets and 5 children tickets.
Please help with answer!
Answer:
0.12 x (x + 3000) = 4200
equation for her salary last year : last year's salary = (4200 / 0.12) - 3000
$32,000
Step-by-step explanation:
Let x = last year's salary
this year's salary = 3000 + x
this equation can be used to determine how much she saved this year = 0.12 x (x + 3000) = 4200
to find last year's salary, make x the subject of the formula
4200 / 0.12 - 3000 = x
x = $32,000
2 times 4? Will mark brainliest! 100 p
Answer:
6
Step-by-step explanation:
Listed are 32 ages for Academy Award winning best actors in order from smallest to largest. (Round your answers to the nearest whole number.) 18; 18; 21; 22; 25; 26; 27; 29; 30; 31; 31; 33; 36; 37; 37; 41; 42; 47; 52; 55; 57; 58; 62; 64; 67; 69; 71; 72; 73; 74; 76; 77 Find the percentile of 74.
Answer:
94%
Step-by-step explanation:
Given the ordered data :
18, 18, 21, 22, 25, 26, 27, 29, 30, 31, 31, 33, 36, 37, 37, 41, 42, 47, 52, 55, 57, 58, 62, 64, 67, 69, 71, 72, 73, 74, 76, 77
The percentile of 74;
From the ordered data ; 74 is at the 30th position in the data ;
Hence, 30 / n ; n = sample size
30 / 32 = 0.9375 = 0.9375 * 100% = 93.75%
Hence, the percentile of 74 is 94% (nearest whole number)
Help Please . its due in 5 hours and i cant find answers
Answer:
39 pi cubic inches
Step-by-step explanation:
The volume of a cone is (1/3)(area of the base)(height).
[tex]V=\frac{1}{3}Bh[/tex]
Find the area of the circular base. The circumference of a circle is [tex]C=2\pi r[/tex], so
[tex]2\pi r = 6\pi\\\\r=3[/tex]
Now that you know the radius of the circular base, you can find its area:
[tex]A=\pi r^2 = \pi(3^2)=9\pi[/tex]
The height of the cone is 13. Time to use the volume formula.
[tex]V=\frac{1}{3}Bh\\\\V=\frac{1}{3}(9\pi)(13)\\\\V=39\pi[/tex]