Answer:
D
Step-by-step explanation:
Which is larger: 90%of 20 OR 20% of 95
Answer: 20% of 95
Step-by-step explanation: 20% of 95 is 19 and 90% of 20 is 18. So 19>18.
Hi! I believe your answer is ---20% of 95--- because 90% of 20 is 18, but 20% of 95 is 19, so that is larger. I hope this helps you! Good luck and have a great day. :)
8.23 A manufacturing company produces electric insulators. You define the variable of interest as the strength of the insulators. If the insulators break when in use, a short circuit is likely. To test the strength of the insulators, you carry out destructive testing to determine how much force is required to break the insulators. You measure force by observing how many pounds are applied to the insulator before it breaks. You collect the force data for 30 insulators selected for the experiment and organize and store these data in Force: 1,870 1,728 1,656 1,610 1,634 1,784 1,522 1,696 1,592 1,662 1,866 1,764 1,734 1,662 1,734 1,774 1,550 1,756 1,762 1,866 1,820 1,744 1,788 1,688 1,810 1,752 1,680 1,810 1,652 1,736 Construct a 95% confidence interval estimate for the population mean force. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)
Answer:
The 95% confidence interval estimate for the population mean force is (1691, 1755).
Step-by-step explanation:
According to the Central Limit Theorem if we have an unknown population with mean μ and standard deviation σ and appropriately huge random samples (n > 30) are selected from the population with replacement, then the distribution of the sample mean will be approximately normally.
The sample selected here is n = 30.
Thus, the sampling distribution of the sample mean will be normal.
Compute the sample mean and standard deviation as follows:
[tex]\bar x=\frac{1}{n}\sum x=\frac{1}{30}\times 51702=1723.4\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{30-1}\times 232561.2}=89.55[/tex]
Construct a 95% confidence interval estimate for the population mean force as follows:
[tex]CI=\bar x\pm z_{\alpha /2}\times\frac{s}{\sqrt{n}}[/tex]
[tex]=1723.4\pm 1.96\times\frac{89.55}{\sqrt{30}}\\\\=1723.4\pm 32.045\\\\=(1691.355, 1755.445)\\\\\approx (1691, 1755)[/tex]
Thus, the 95% confidence interval estimate for the population mean force is (1691, 1755).
Here is a polygon Draw a scaled copy of the polygon using a scale factor of
A hot air balloon is descending at a rate of 6.75 feet per second.
What is the change in the balloon's height after 3 seconds?
The hot air balloon will descend 20.25 feet per second.
What is an expression?Expression in maths is defined as the collection of numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.
Given that a hot air balloon is descending at a rate of 6.75 feet per second. The height of the balloon after 3 seconds will be:-
Rate of change = Height / Time
6.75 = Height / 3
Height = 6.75 x 3 = 20.25 feet
Therefore, the hot air balloon will descend 20.25 feet per second.
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Solve the system and explain what the answer means Y-5=3x, -2Y+6x=4
Answer:
NO SOLUTION
Step-by-step explanation:
solve for y in : y-5=3x which is then y=3x+5
then substitute y=3x+5 into -2y+6x=4 which is then -10=4
and then lastly since -10=4, it is not true, this is an inconsistency system,
SO NO SOLUTION
If y varies directly as x, and y is 20 when x is 4, what is the constant of variation for this relation?
01 -
5
05
1
16
Answer:
5
Step-by-step explanation:
y
y=ax
where a is a constant of proportionality;
y=20, x=4
20=4a
a=20/4
a=5
y=5x
The constant of variation is 5
The constant of variation for the given relationship is 5.
What is Direct Variation?Direct variations are defined as the functions of the form y = kx, where k is a constant.
Here when y increases, x increases and if y decreases, x also decreases.
Given that,
y varies directly as x
So the equation will be of the form,
y = kx
Here k is the constant of variation.
Given, y is 20 when x is 4.
So, 20 = 4k
k = 20 / 4 = 5
Hence the constant of variation for the given relationship is 5.
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Which number is the greatest? Which is the least
NEVER MIND DON'T DO THIS
BUT I DO NEED POINTS SO COMMENT
Answer:
Huh?
Step-by-step explanation:
American Airlines stock is currently $12.23 per share. How many shares could you buy
with $2000?
—————————
a-2000
b-200
c-163
d-164
Answer:
c
Step-by-step explanation:2000/12.23
I WILL MARK BRIANLyEST
Jose needs to know if the triangle shown is a right triangle. Which equation should he use to help?
Group of answer choices
11 + 5 = 13
Square root of 5 dived by square root of 11= square root of 13
5^2+11^2=13^2
5^3-11^2=13^2
Step-by-step explanation:
5^2+11^2=13^2 is the answer. However, once you add the 25 and 121 together(the squares of 5 and 11), which is 146, you then need to square root the 146 to get C.
Answer:
11² + 5² = 13²Step-by-step explanation:
use the Pythagorean
a² + b² = c²
11² + 5² = 13²
What is the domain of the graph please hurry it’s urgent Thank you
Answer: the answer is (2,5)
Step-by-step explanation:
Trevor surveyed attendees at a comic book convention about the distance they lives from the convention center in the top of ticket they purchased for the event the data he gathered is shown in a two-way table below how many people did Trevor survey
Answer:137
Im not completely sure though!
Step-by-step explanation:
Answer:
its 137 im 100% sure of it
Step-by-step explanation:
Please help me on this question ASAP if you do ill give you brainliest!
Answer:
1. 2/21
2. 7/45
3. 9/26
4. 4/61
5. 3/29
6. 8/61
Step-by-step explanation:
I'll just explain number one, since you can do the same thing to solve all the others.
You start with 10 1/2. You can make this an improper fraction by multiplying 10 and 2, then adding one. This leaves you with 21/2. The reciprocal of a fraction is just the numerator and denominator of the fraction flipped. So, you get 2/21.
Hope this helps!
Football coaches running their summer practices noticed
that the players who weighed more typically had slower
times for their 40-yard dash.
What are the explanatory variable and response variable
for this relationship?
O Explanatory variable: season
Response variable: player weight
O Explanatory variable: season
Response variable: player 40-yard-dash time
O Explanatory variable: player weight
Response variable: player 40-yard-dash time
Explanatory variable: player 40-yard-dash time
Response variable: player weight
Answer:
Warning! The person above me is WRONG.
D is INCORRECT.
The correct answer is C.
Explanatory variable: player weight
Response variable: player 40-yard-dash time
The explanatory variable is the player's weight
The response variable is the player's 40-yard dash.
Option C is the correct answer.
What is explanatory and response variable?An explanatory Variable is a causal variable, which affects the other variable.
The response Variable is the resultant variable, which is affected by the other variable.
We have,
Football coaches running their summer practices noticed that the players who weighed more typically had slower times for their 40-yard dash.
We need to find what causes the player to have slower times.
The weight of the players causes the players to have slower times.
So,
Player weight is the explanatory variable and the response variable is the time for their 40-yard dash.
Thus,
The explanatory variable is the player's weight
The response variable is the player's 40-yard dash.
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plz help me I can't figure it out
Answer:
A.
[tex]\sqrt{500}[/tex]
Step-by-step explanation:
when a value is outside of the root, then you can square it and put it back in. After you put it back in, you need to multiply it by the number that is remaining
In this case, you would square 10 which equals 100, and put it back into the root and multiply 100 by 5.
100x5=500
Therefore, the answer is A, root 500
state the domain of the relation ? ( there is more than one?) select all that apply
Answer:
I think it's {3, 6, 12, 18}
Step-by-step explanation:
Domain: all x-values that are to be used (independent values).
PLZ HELP I WILL MARK BRAINLEST!
Answer:
5
Step-by-step explanation:
80 is at the top and 40 takes half of the bottom so the other half is 40.
15/120 = 0.125 so...
40x0.125 will be your answer.
You get 5.
How many quarts rounded to the nearest tenth are in 50 liters
Answer:
52.8
Step-by-step explanation:
If you were to look this up 50 liters = 52.8344
The question asks you to round to the nearest tenth so 52.8344 is now shown as 52.83 when you round that you can see that 52.83 rounded to the nearest tenth is 52.8 and that's your answer.
PLEASE MARK AS THE BRAINLIEST PLEASE
What's the answer? pleaseee help
Answer:
m = 2
Step-by-step explanation:
To find the slope, simply use this equation:
m = y2 - y1 / x2 - x1
Now we need to insert some points:
m = 10 - 0 / 11 - 6
m = 10/5
m = 2
Therefore, the slope of the line is 2.
Davion’s crew can hang 12 sheets of drywall in 15 minutes. At this rate, how many sheets can they hang in 1 hour? (15 minutes # 1/4 hour
Answer:
48 sheets
Step-by-step explanation:
15*4=60m=1hr
So 12*4=48 sheets in an hour
Four more than a number is negative twenty..
Answer:
The number is negative 16
Step-by-step explanation:
if it is trying to find the number
A farmer watered 3/7 of a field. What percentage is equivalent to the fraction of the field the farmer watered?
Answer:510
Step-by-step explanation:
Answer:
510
Step-by-step explanation:
Is this function? Please help
Answer:
Its a funcion if "x" doesnt repeat
Step-by-step explanation:
The ratio of the number of Andy's seashells to the number of seashells Ben has is 4:9. Andy has 100 seashells. How many does Ben have?
Answer:
Ben has 225
Step-by-step explanation:
100 ÷ 4 = 25
25 × 9 = 225
which equation is equivalent to (r/s)(6)
Answer:
[tex]\frac{6r}{s}[/tex]
Step-by-step explanation:
8 loads of stone weigh 2/5 ton. Find the weight of 1 load of stone.
Answer:
100 pounds
Step-by-step explanation:
2/5 ton equals 800 pounds
800 divided by 8 equals 100 pounds
X+y+z=2
-x+3y+2z=8
4x+y=4
Answer:
So what do you need help in plz
Pls help i need it now ill give brainliest if right (:
-7 [tex]\frac{9}{16}[/tex]
-2 3/4 = -2.75
-2.75^2 = -7.5625
-7.5625 = -7 [tex]\frac{9}{16}[/tex]
The width of a slot of a duralumin forging is (in inches) normally distributed with μ= 0.9000 and σ = 0.0030. The specification limits were given as 0.9000 ±0.0050. Show your calculations. Draw normal curves wherever appropriate.
a) What percentage of forgings will be defective?
b) What is the maximum allowable value of σ that will permit no more than 1 in 100 defectives when the widths are normally distributed with μ = 0.9000 and σ (revised value)?
Answer:
a) 9.56%
b) 0.0019
Step-by-step explanation:
a) Find the z-scores.
z = (x − μ) / σ
z₁ = (-0.0050) / 0.0030
z₁ = -1.67
z₂ = (0.0050) / 0.0030
z₂ = 1.67
Find the probability using a chart or calculator.
P(Z < -1.67 or Z > 1.67) = 2 P(Z < -1.67)
P(Z < -1.67 or Z > 1.67) = 2 (0.0478)
P(Z < -1.67 or Z > 1.67) = 0.0956
b) Use a chart or calculator to find the z-score.
P(Z < -z or Z > z) = 0.01
P(Z < -z) = 0.005
z = 2.576
Find the standard deviation.
z = (x − μ) / σ
2.576 = (0.0050) / σ
σ = 0.0019
Select all polynomial expressions that are equivalent to 6x^4+4x^3-7x^2+5x+8
Complete question is;
Select all polynomial expressions that are equivalent to 6x⁴ + 4x³ – 7x² + 5x + 8.
A. 16x^(10)
B. 6x^(5) + 4x⁴ – 7x³ + 5x² + 8x
C. 6x⁴ + 4x³ - 7x² + 5x + 8
D. 8 + 5x + 7x² - 4x³ + 6x⁴
E. 8 + 5x – 7x² + 4x³ + 6x⁴
Answer:
Options C & E
C. 6x⁴ + 4x³ - 7x² + 5x + 8
E. 8 + 5x – 7x² + 4x³ + 6x⁴
Step-by-step explanation:
To find the polynomial expressions that are equivalent to 6x⁴ + 4x³ – 7x² + 5x + 8 simply means that both polynomials must have identical signs, identical number of terms and identical terms.
Now, by inspection of tall the options, we can see that options C & E are equivalent to the initially given polynomial.
For option C: 6x⁴ + 4x³ - 7x² + 5x + 8
This expression is the exact same thing as what was given in the question.
For option E: 8 + 5x – 7x² + 4x³ + 6x⁴
Rearranging this gives;
6x⁴ + 4x³ - 7x² + 5x + 8
Again this is exactly the same expression given to us in the question.
The owner of a small deli is trying to decide whether to discontinue selling magazines. He suspects that only 10.7% of his customers buy a magazine and he thinks that he might be able to use the display space to sell something more profitable. Before making a final decision, he decides that for one day he will keep track of the number of customers that buy a magazine. Assuming his suspicion that 10.7% of his customers buy a magazine is correct, what is the probability that exactly 4 out of the first 13 customers buy a magazine
Answer:
0.0329 ≅ 0.03 to two decimal places
Step-by-step explanation:
The owner of a small deli is trying to decide whether to continue or discontinue selling magazines.
His suspicion that only 10.7% of his customers by a magazine (daily) is correct.
What is the probability that exactly 4 out of the first 13 customers (on this day) buy a magazine?
The probability is:
10.7% × 4/13 = 10.7/100 × 4/13 = 0.107 × 0.308 = 0.0329 ≅ 0.03 to two decimal places
