Answer:
The critical value that should be used is T = 2.0796.
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 22 - 1 = 21
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 21 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.95}{2} = 0.975[/tex]. So we have T = 2.0796, which is the critical value that should be used.
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 2.0796\frac{15.49}{\sqrt{22}} = 6.868[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 98.78 - 6.868 = $91.912
The upper end of the interval is the sample mean added to M. So it is 98.78 + 6.868 = $105.648
The 95% confidence interval for the mean repair cost for the dryers is between $91.912 and $105.648.
What is the greatest common factor of the numerator and denominator in the expression: 6x+2x^2/9x^2+3x^3?
A. 3+x
B. 3x+x^2
C. x
D. 2/3x
Answer:
A) 3+x
Step-by-step explanation:
6x + 2x² / 9x² + 3x³
2x(3 + x) / 3x²(3 + x)
Speedy crawled 5/9 yards. Slimy crawled 4 times as far as speedy. How far did slimy crawl?
Answer:
2 2/9 yards or 20/9 yards
Step-by-step explanation:
Slimy went 4 times as much as Speedy did so that means 5/9 x 4 yards which is the same thing as 5 x 4/9 so 5 x 4/9 equals 20/9 or 2 2/9 so Slimy crawled 2 2/9 yards.
Please Classify ∠1 and ∠2 using all names that apply
Answer:
Supplimentery angles
If the sum of the measures of two angles is 180 degrees, then the angles are supplementary angles.
Answer:
∠1 & ∠2 are supplementary angles & they form a linear pair. (option D)
THE TOPIC IS: AREA OF CIRCLES!! PLEASE HELP ME WITH THIS QUESTION!!! WHATS THE ANSWER?? I WILL GIVE YOU BRAINLIEST AND A THANKS!!! AND PLS PUT AN EXPLANATION!! THANK YOU GUYS SO MUCH!!
Answer:
Step-by-step explanation:
diameter= 22 mm
Radius is half of diameter
r = 22/2 = 11mm
Area of circle = πr²
= 3.14 * 11*11
= 379.94 mm²
Diameter (d) of circle = 22 mm
To Find:-Area of circle.
Solution:-Diameter (d) of circle = 22 mm (Given)
So, radius (r) of circle = [tex] \frac{d}{2} [/tex] = [tex] \frac{22}{2} [/tex] = 11 mm.
Now, we know,
Formula of Area of Circle is πr².
So, Area of Circle = [tex] \frac{22}{7} [/tex] × (11)²
Area of Circle = [tex] \frac{22}{7} [/tex] × 11 × 11
Area of Circle = [tex] \frac{22 \: × \: 11 \: × \: 11}{7} [/tex]
Area of Circle = [tex] \frac{2662}{7} [/tex]
Area of Circle = 380.29
Area of Circle is 380.29 sq mm. [Answer]7) Rob and Amy are selling cheesecakes for a school fundraiser. Customers can buy New York
style cheesecakes and chocolate marble cheesecakes. Rob sold 11 New York style cheesecakes
and 7 chocolate marble cheesecakes for a total of $266. Amy sold 4 New York style cheesecakes
and 14 chocolate marble cheesecakes for a total of $280. What is the cost each of one New York
style cheesecake and one chocolate marble cheesecake?
9514 1404 393
Answer:
New York style: $14Chocolate Marble: $16Step-by-step explanation:
We can let n and c represent the costs of the New York style and the chocolate marble cheesecakes, respectively. Then the two sales are ...
11n +7c = 266 . . . . . . . Rob's sale
4n +14c = 280 . . . . . . Amy's sale
The ratio of coefficients of c is a "nice" number (2), so we can eliminate the c variable easily to solve this. Dividing the second equation by 2 and subtracting it from the first gives ...
(11n +7c) -(1/2)(4n +14c) = (266) -(1/2)(280)
9n = 126 . . . . . . simplify
n = 14 . . . . . . . . divide by 9
Filling this into the first equation, we have ...
11(14) +7c = 266
7c = 112 . . . . . . . . subtract 154
c = 16 . . . . . . . divide by 7
One New York style cheesecake costs $14; one chocolate marble cheesecake costs $16.
Surface area is always measured in square units. True False
Answer:
The answer is True.
Answer:
True
Step-by-step explanation:
Area is always measured in square units, also including surface area
Estimate the given rotation within 10 degrees:
Answer:
70∘
Step-by-step explanation:
LCM OF (2^3×3×5) and (3×5) is
(a)8
(b)120
(c)40
(d)180
Answer:
120
Step-by-step explanation:
2³* 3 * 5
3*5
LCM = 2³ * 3 * 5 = 8 * 3 * 5 = 120
The blue whale, the fastest marine mammal, can travel 60 miles in 2 hours. The fastest fish, the sailfish, can travel 136 miles in 2 hours. How much faster is the sailfish than the blue whale?
A. 76 mph faster
B. 58 mph faster
C. 38 mph faster
D. 26 mph faster
Answer:
c 38
Step-by-step explanation:
i got it right on the quiz
Answer:
C
Step-by-step explanation:
What is the value of x in the figure shown below?
The value of X is 35 because the angle 35 measures the same as the angle X, hence their values are the same
find the volume of a box whose length breadth and height are 28 CM 18 cm and 10cm respectively
I will mark them as brainlists all the best
The surface area of a trianglular pyramid is 305 square inches. the area of the base is 35 square inches. Each face has a base of 9 inches. What is the slant height?
i need help with this! pls pls
Answer:
x = 21 degrees
Angle KMH = 96 degrees
Step-by-step explanation:
The first question is what is x. To find that out the opposite angle of 4x is the same as x. That is 84 degrees. So take 84 and divide it by 4 you get 21.
x = 21 degrees.
The second question is what is the angel of KMH. A straight line is 180 degrees. If you take the 84 degrees and subtract it from 180 you will get what that angle equals. It equals 96 degrees.
Please hurry!!!!!!!!!!!!!!!
Answer:
a -------> 4
b -------> -2
c -------> -1
d -------> -4
how do you solve this problem
1/3 *3-3=4
This is PEMDAS as well as order of operations and or parentheses, exponents, multiplication, division, addition, and subtraction. Multiplication and division go together, so you do whichever one comes first. Same goes to addition and subtraction. A way to remember the order is Please Excuse My Dear Aunt Sally.
Two dice are
thrown, what
is the probability that the sum
of the numbers is divisible by 5?
Answer:
Step-by-step explanation:
Remark
Two results are divisible by 5.
The two are 5 and 10.
There are 36 possible outcomes when throwing 2 dice
Five
You can throw a 5 four different ways
4 - 1
1 - 4
2 - 3
3 - 2
Probability: 4/36
Ten
Ten can be thrown 3 different ways
5 - 5
6 - 4
4- 6
Probability : 3/36
Answer
The probability of a 5 or a 10 = 4/36 + 3/36 = 7/36
If you mean something else, leave a note in the comment and I'll get back to this. Please leave something specific. It's wrong doesn't help me.
what is 2x2+2i know the answer but you answer it
A. 1
B. 3
C.2
D.6
If the outside diameter of a pipe is 1.25 ft and the inside diameter is 0.975 ft how thick is the pipe
Answer:
0.275
Step-by-step explanation:
1.25-0.975=0.275
If all dimensions of a rectangular prism are multiplied by 4, which statement is true?
A. The total surface area is multiplied by 64. The volume is multiplied by 16.
B. The total surface area is multiplied by 64. The volume is multiplied by 64.
C. The total surface area is multiplied by 16. The volume is multiplied by 64.
D. The total surface area is multiplied by 4. The volume is multiplied by 16.
No dam links
Answer:
Step-by-step explanation:
K
Probability of dependent events
Espanol
A department store is holding a drawing to give away free shopping sprees. There are 9 customers who have entered the drawing: 4 live in the town of Gaston,
2 live in Pike, and 3 Ilve In Wells. Two winners will be selected at random. What is the probability that the first winner lives in Wells and the second lives in
Gaston? Write your answer as a fraction in simplest form.
0
$
2
Explanation
Check
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Answer:
1/9
Step-by-step explanation:
write the expression for 5 minus q
Answer:
5 - q
Step-by-step explanation:
the term minus indicates a sign of subtraction, which looks like this
-
Therefore, the expression is 5 - q
Which is bigger a population or a sample?
a - Population
b - Sample
c - They are both the same
what are the answer and processes? 5x-9=11
Answer: x=4
Step-by-step explanation:
5x-9=11
5x=11+9
5x=20
X=4
Which features are present in this polar graph?
The features that is present in this polar graph is that A. Symmetry about the polar axis θ = 0.
What is true of the polar graph?The polar graph can be said to have a symmetry about the polar axis which means that theta or θ is equal to 0.
This is because the graph is symmetric about the x-axis. This means that all the lines of symmetry can be seen intersecting the graph at x = 0. This proves that there is indeed symmetry in the polar graph.
In conclusion, option A, θ = 0 is correct.
Find out more on polar graphs at https://brainly.com/question/22692278
#SPJ1
Line ABC is a straight line
Which descnbes the relationship between 21 and 22?
21 and 22 are complementary angles.
21 and 22 are supplementary angles.
21 and 22 are vertical angles
21 and 22 are acute angles
Answer:
angle 1 and angle 2 are supplementary angle
Answer: the answer is b
Step-by-step explanation:trust
Sondra has 1 gallon of milk. Her pudding recipe calls for 1 quart of milk, but she triples the recipe. How many cups of milk does she have left over? A 1 cup B 3 cups С 4 cups D 8 cups
Answer:
c
Step-by-step explanation:
this is because one quart is 4 cups and 4 quarts are one gallon. this means that if you use three quarts, you have one left over. one quart is the same as 4 cups
that "photo" is a danger to your device
One quart is the same as the 4 cups of milk she has leftover, the option C is the correct answer.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Sondra has 1 gallon of milk. Her pudding recipe calls for 1 quart of milk, but she triples the recipe.
1 gallon of milk = 1 quart of milk,
one quart is 4 cups and 4 quarts is one gallon which means that if you use three quarts, you have one leftover.
one quart is the same as 4 cups.
Learn more about the unitary method;
https://brainly.com/question/23423168
6. Write the formula of circumference
of a circle when its diameterld)
is given.
Step-by-step explanation:
nl the way home now so I'm gonna get
Plz help if correct ill give brailiest
Answer:
That first one is the answer
Answer:
the last one
Source : Trust me Bro
(its actually the last one)
What is the value of the 3 in the number 738?
(please help )
PLEASE HELP !! ILL GIVE BRAINLIEST !!
Answer:
HIK and GFD,
Step-by-step explanation: