Answer:
The width is [tex]W = 1.2786[/tex]
Step-by-step explanation:
From the question we are told that
The sample size is n = 16
The mean time is [tex]\= x = 2.8 \ minute[/tex]
The standard deviation is [tex]s = 1.2 \ minutes[/tex]
Generally the degree of freedom is mathematically represented as
[tex]df = n - 1[/tex]
=> [tex]df = 16 - 1[/tex]
=> [tex]df = 15[/tex]
From the question we are told the confidence level is 95% , hence the level of significance is
[tex]\alpha = (100 - 95 ) \%[/tex]
=> [tex]\alpha = 0.05[/tex]
Generally from the t distribution table the critical value of [tex]\frac{\alpha }{2}[/tex] at a degree of freedom of df = 15 is
[tex]t_{\frac{\alpha }{2} , 15 } = 2.131[/tex]
Generally the margin of error is mathematically represented as
[tex]E = t_{\frac{\alpha }{2}, 15 } * \frac{\sigma }{\sqrt{n} }[/tex]
=> [tex]E = 2.131 * \frac{ 1.2 }{\sqrt{16} }[/tex]
=> [tex]E = 0.6393 [/tex]
Generally the width the confidence 95% confidence interval
[tex]W = 2 * E[/tex]
=> [tex]W = 2 * 0.6393[/tex]
=> [tex]W = 1.2786[/tex]
what is (-2³)-2. PLEASE I NEED LOTS OF HELP. I BEG YOU
Answer:
-10
Step-by-step explanation:
-2³-2=-8-2=-10
2³= 8 = 2×2=4×2=8
A pre-algebra book is 8 1 half inches by 9 1 fourth inches. Determine the perimeter of the textbook.
Answer:
Rectangular book--
two 8 1/2 sides
two 9 1/4 sides
8 1/2*2=17
9 1/4*2=18 1/2
17+18 1/2= 35 1/2
The perimeter of the textbook is 35 1/2 inches or 35.5 inches.
-this is not mine btw creds to sunflowerem :))
I need help with this
Answer:
the answer is c and maybe b and aslo maybe a also maybe d
Step-by-step explanation:
hahah I hope this help but it is b b is the correct answer
14,6,-2,...;27th term
Answer:
27th term = -194
Step-by-step explanation:
The terms decrease by 8.
Which expression is equal to (−4x2−1)(2x2+3)?
−8x4−14x2−3
−8x4−10x2+3
−8x2−14x−3
8x4−14x2+3
Answer:
The first one:
−8x4−14x2−3
Step-by-step explanation:
(-4•2-1)(2•2+3)
-4•2 = -8
-8 - 1 = -9
(-9)(2•2+3)
2•2 = 4
4+3 = 7
(-9)(7) = -63
Now we find the one that equals -63:
-8•4-14•2-3
(-8•4)-14•2-3
-32-14•2-3
-32-(14•2)-3
-32-28-3
(-32-28)-3
-60-3
-60-3 = -63
BAM! THE ANSWER!
Answer:
The firs one is the right one
Step-by-step explanation:
BRAINLYEST TO THE FIRST PERSON TO GET THEM RIGHT AND 5 STARS!!!!! simplify 7/10 x 1/3 x 2/3 A. 7/45 B. 14/90 C. 1 2/5 D. 6 3/7 Simplify
4 2/5 x 3
A. 66/5
B. 4 2/5
C. 12 2/5
D. 13 1/5 Simplify
4 3/5 x 3
A. 69/5
B. 7 1/5
C. 12 3/5
D. 13 4/5 Simplify
4 2/5 x 3 2/5
A. 374/25
B. 9 3/5
C. 12 4/25
D. 14 24/25 Simplify
(3/4)^2
A. 3/4
B. 6/8
C. 9/16
D. 2 1/4
Answer:
1) 7/45
2) 13 1/5
3) 13 4/5
4) 14 24/25
5)9/16
Step-by-step explanation:
ez
When a sample size is greater than 10, the standard deviation of the sample is an accurate predictor of the population standard deviation. A. True B. False
Answer:
false because 40 is still very very small
Step-by-step explanation:
algebra 1 please help
Answer:
that seems hard
Step-by-step explanation:
i cant see the pic tho
Expand the expression.
t(–1.2w + 3)
Answer:
-2.5
Step-by-step explanation:
srry if I'm wrong...........
The expression t(–1.2w + 3) can be expanded as -1.2wt + 3t.
What is an expression?An algebraic expression in mathematics is an expression which is made up of variables and constants, along with algebraic operations (addition, subtraction, etc.). Expressions are made up of terms.
Given expression,
t (-1.2w + 3)
Using distributive property
-1.2wt + 3t
Hence, -1.2wt + 3t is the expanded form of the expression t(–1.2w + 3).
Learn more about expressions here:
https://brainly.com/question/13947055
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Can you help me find x and y intercept?
I dont understand how to do it.
Answer:
The y-intercept is where the line crosses the y-axis, and the x-axis is where the line crosses the x-axis. For example, the y-intercept for Line A is 2 because it crosses the y-axis at (0,2) on the coordinate plane.
Step-by-step explanation:
Answer: y= 12 and x= is a value
Step-by-step explanation:
x=2+7=x
y= 7+5=y which is 12
Been stuck on this one
y-intercept of –7 and a slope of 3/2
Answer:
y=3/2x-7
Step-by-step explanation:
Slope-intercept formula: y=mx+b
m= slope
b= y-intercept
Replace the "m" and "b" the number that is given it
So the slope of 3/2 will look like this in the equation:
y=3/2x+b
THe y-intercept of -7 will look like this in the equation with the slope:
y=3/2x-7
Hope this helps!
How many times does 25 go into 63
Answer:
2 times
Step-by-step explanation:
25 x 2 is 50. And 25 x 3 is 75, and 75 is larger then 63.
Please help ASAP Due in 1 hour!!! Marking Brainliest!!!
Answer:
the answer is d
Step-by-step explanation:
a function is where you have 1 output for every input so you can't have an x value with 2 different outputs
Answer: I’m sure it’s D
Step-by-step explanation:
46 + [3(2+5)] + 5}
Simplify expression using order of operations
uhhhh
Step-by-step explanation:
Answer:
72
Step-by-step explanation:
To solve 46 + {[3(2+5)]+5}, you would first do what is inside the () so that would be 2+5, then you would move outward multiplying 7 by 3 to get 21, then adding 5 to get 26. Then you would finally add 46 to get 72
What is the solution of the equation 2X = 7? Round your answer to the nearest ten-thousand.
Answer:
x =2.8074
Step-by-step explanation:
2^x = 7
Take the log of each side
log (2^x) = log (7)
We know log a^b = b log a
x log 2 = log 7
x = log (7) / log 2
x =2.80735
To the nearest tenth thousandth
x =2.8074
A cylinder has a height of 9 inches and a diameter of 12 inches. What is its volume?
Answer:
The volume of the cylinder is 4071.5
May I have brainliest please? :)
Mr. Hawkins is covering a wall with
wallpaper. The room measures 14 feet by 12
feet in a rectangular shape. Each square foot
of wallpaper costs $2.90. What is the cost of
adding wallpaper to the room
Answer:
The total cost of adding wallpaper to the room is $487.20
Step-by-step explanation:
Basically, how I got the answer is:
1. The shorter sides of the rectangle are 12 and the longer sides are 14.
2. The formula for a rectangle is A = l x w. The "l" means length and the "w" means width. 14 is the length and 12 is the width. So you should now have A = 14 x 12. If you multiply 14 by 12, you will get 168.
3. Since 1 square foot of carpet costs $2.90, then you should multiply by 168, which will give you $487.20 and that's pretty much it.
Hope this helps! :)
The total cost of adding wallpaper to the room by Mr. Hawkins is $487.20.
What is Area?Area of a two dimensional shape is the total region which is bounded by the object's shape.
Given that the shape of the wall that Mr. Hawkins covering with wallpaper is rectangular.
The formula to find the area of a rectangular shape is,
Area of a rectangular shape = Length × Width
Given that,
Length of the wall = 14 feet
Width of the wall = 12 feet
Substituting the given measurements to the formula, we get,
Area of the wall = 14 × 12 = 168 feet²
Also, given that,
Cost for each square foot of wall = $2.90
Cost for 168 square feet = $2.90 × 168
= $487.20
Hence the total cost for adding wallpaper to the room is $487.20.
To learn more about Area, click on the link given here :
https://brainly.com/question/1658516
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A wave is traveling with a speed of 330 m/sec and has a frequency of 110 Hz. Determine its wavelength (λ).
λ= speed/frequency
frequency=speed/ λ
speed= λfrequency
Group of answer choices
3 km
11 m
11 km
3 m
Answer:
11
Step-by-step explanation:
11
What is the unit rate of 15 crayons and 30 markers
Answer: For every one crayon, there are 2 markers
Step-by-step explanation:
We must divide each number by it's GCF
15 / 15 = 1
30 / 15 = 2
Answer: 1 to 2
There are 3,072 books in the school library. If 96 students team up to read all the books and each student reads the same number of books, how many books will each student need to read? *
Answer:
32
Step-by-step explanation:
Equivlency:
3072/96 =32
what fraction of 5 liter is 1500 ml
Which is the best estimate for the percent equivalent to StartFraction 3 Over 8 EndFraction?
Answer:
The answer is 38%.
Is the sum positive negative or zero without adding -8+20
Answer:
positive
Step-by-step explanation:
-8+20 will have a positive sum because the positive number 20 is greater than the negative number 8
Answer:
Positive
Step-by-step explanation:
Without adding you can tell wether a number is positive or negative with addition because it is basically a number line. Think of subtracting -8 from 0 which would give you -8. Now add 20 to it causing it to get out of the negatives and become positive.
-6 x 1
I don't understand
Answer:
It's literally -6.
Step-by-step explanation:
Answer:
-6
Step-by-step explanation:
Any negative number times a positive number, is automatically going to be a negative number.
- X + = -
- X - = +
+ X + = +
Which scenario could be represented by this graph?
a. Randy turns the oven off. After heating his food for 10 minutes, he turns the oven off. The a-axis represents time; the y-axis represents the oven temperature.
b. Randy places a thermometer inside a beaker of water and brings it to a boil. When the water begins boiling, he turns off the heat and waits until the water returns to room temperature. The x-axis represents time; the y-axis represents the temperature reading.
c. Randy turns off the oven. After the oven returns to room temperature, he waits 10 minutes and then turns the oven back on. The x-axis represents time; the y-axis represents the oven temperature
d. Randy place is a thermometer inside a beaker of water and brings it to a boil. the x-axis represents time; the y-axis represents the temperature reading
Answer:
The answer is C
Step-by-step explanation:
When he turned the oven off the temperature dropped. Then is stayed at a steady 0° until he turned it back on, causing the graph to move up again because the temperature rose.
Answer:
The answer is C
Step-by-step explanation:
When he turned the oven off the temperature dropped. Then is stayed at a steady 0° until he turned it back on, causing the graph to move up again because the temperature rose.
which points are separated by distance of 6 units?
A. (1,3) (6,3)
B. (7,2) (1,2)
C. (8,1) (1,1)
D. (5,6) (4,6)
HELP PLZZZZZ ASAP
What is the new price of a clock that is on sale for 25% off the original price of $30.00?
$25.00
$22.50
$23.50
$7.50
Answer: $22.50
Step-by-step explanation:
25% of 30 = 7.5
30 - 7.5 = 22.50
Answer:
$22.50
Step-by-step explanation:
$30.00 x %25 or .25 = $7.50
$30.00 - $7.50 = $22.50
What does the point (1, 35) mean in this situation?
Answer:
The x-axis is 1 and the y-axis is 35
Correct me please if I am wrong :)
Step-by-step explanation:
What is a fraction form of 1.40?
Giving Brainliest To the First Correct Answer:)
Answer:
10
Step-by-step explanation:
12/2=6+4=10