The required standard deviation is 42.53 approximately
Given the population data: 217, 137, 118, 67, 107, 177, 143, 120
So the total number of observation = 8
So the mean = (217+137+118+67+107+177+143+120)/8 = 1086/8 = 135.75
So the required standard deviation of the given population is given by,
\(=\sqrt{\frac{\sum_{i=0}^n{(x_i-\mu)}}{N}}\\=\sqrt{\frac{(81.25)^2+(1.25)^2+(-17.75)^2+(-68.75)^2+(-28.75)^2+(41.25)^2+(7.25)^2+(15.75)^2}{8}}\\\approx42.53\)
Hence the standard deviation is 42.53 approximately.
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Solve the problems.
1 Which expressions can be used to find the total amount that must be repaid
on a 1-year loan of d dollars with 4% simple interest rate?
Choose all that apply.
A 1.04d
1
Bd 10.40
ca 11.25d
D d 10.04d
Ed1 1.040
2 Michollo ordorod 200T
Answer:
A 1.04d
Step-by-step explanation:
The amount of the loan (d) must be paid, along with the interest (0.04d).
d + 0.04d = 1.04d
Answer : The correct options are, (A), (C) and (D)
Step-by-step explanation :
Given:
Principle = P = (d) dollars
Interest rate = R = 4 %
Time = T = 1 year
First we have to determine the simple interest.
Using simple interest formula:
where,
P = principle
R = interest rate
T = time
S.I = simple interest
Now put all the given values in the above formula, we get:
Now we have to determine the total amount.
Amount = Principle + Simple interest
Amount = d + 0.04d
Amount = 1.04 d
Amount = d + 1/25d
Thus, the correct options are, (A), (C) and (D)
-52=-0.8k need a answer
Answer:
k is 65
Step-by-step explanation:
isolate the variables by dividing each side by factors that don't contain the variable
solve: 5y – 3.5 = 10.5
Answer:2.8
Step-by-step explanation:add 3.5 to the 10.5 which equals 14 then you divide 5 by 14 to get the y alone and it equals 2.8
Translation to the question
The curve y=2x-x^2 contains along with the x-axel an area. See figure. Calculate the triangles maximum area. Answer exactly.
\(1/2 * 2 * 1 = 1\) square unit.
Step-by-step explanation:
To find the maximum area of the triangle, we need to locate the vertex of the parabola. This occurs when x=1. The y-coordinate at x=1 is 1. We can then use this as the height of the triangle. The base of the triangle is the distance between x=0 and x=2, which is 2. Therefore, the maximum area of the triangle is 1/2 * 2 * 1 = 1 square unit.
2/5 of employees in a company drive to work, 1/3 travel by bus and the rest walk. 1. Find the fraction of who walk.
Answer:
4/15
Step-by-step explanation:
2/5 drive
1/3 bus
and rest walk
fraction of those who walk is 1-(2/5+1/3)
2/5+1/3=(6+5)/15=11/15
15/15-11/15=4/15
An electrician wants to know whether batteries made by two manufacturers have
significantly different voltages. The voltage of 108 batteries from each manufacturer
were measured. The population standard deviations of the voltage for each
manufacturer are known. The results are summarized in the following table.
Manufacturer Sample mean voltage (millivolts) Population standard deviat
A
B
179
178
1
What type of hypothesis test should be performed? Select
What is the test statistic? Ex: 0.12
Does sufficient evidence exist to support the claim that the voltage of the batteries made
by the two manufacturers is different at the a= 0.05 significance level?
The appropriate hypothesis test is a two-sample t-test for independent samples.
The appropriate hypothesis test in this scenario is a two-sample t-test for independent samples. Since the population standard deviations are known, we can use the Z-test instead.
The test statistic can be calculated using the formula:
t = (x1 - x2) / sqrt((s1^2 / n1) + (s2^2 / n2))
Where:
x1 and x2 are the sample means for Manufacturer A and Manufacturer B, respectively.
s1 and s2 are the population standard deviations for Manufacturer A and Manufacturer B, respectively.
n1 and n2 are the sample sizes for Manufacturer A and Manufacturer B, respectively.
Plugging in the given values:
x1 = 179, x2 = 178, s1 = 1, s2 = 5, n1 = n2 = 108
t = (179 - 178) / sqrt((1^2 / 108) + (5^2 / 108))
t = 1 / sqrt(0.00926 + 0.0463)
t ≈ 1 / sqrt(0.05556)
t ≈ 1 / 0.2357
t ≈ 4.241
To determine whether there is sufficient evidence to support the claim that the voltage of the batteries made by the two manufacturers is different, we compare the calculated t-value to the critical value from the t-distribution at the desired significance level (0.05).
The decision depends on the degrees of freedom for the test, which is calculated as (n1 + n2 - 2) = (108 + 108 - 2) = 214.
Using a t-table or statistical software, we find that the critical value for a two-tailed test with a significance level of 0.05 and 214 degrees of freedom is approximately ±1.972.
Since the calculated t-value of 4.241 exceeds the critical value of 1.972, we reject the null hypothesis and conclude that there is sufficient evidence to support the claim that the voltage of the batteries made by the two manufacturers is different at the 0.05 significance level.
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please help!
this is due by tonight
Answer:
6
Step-by-step explanation:
The two triangles are similar which means the the two length is parallel
.°., the Length of the smaller triangle=6
-3(x-14) + 9x = 6x + 42
Answer:
All real numbers are solutions.
Step-by-step explanation:
Let's solve your equation step-by-step.
−3(x−14)+9x=6x+42
Step 1: Simplify both sides of the equation.
−3(x−14)+9x=6x+42
(−3)(x)+(−3)(−14)+9x=6x+42(Distribute)
−3x+42+9x=6x+42
(−3x+9x)+(42)=6x+42(Combine Like Terms)
6x+42=6x+42
6x+42=6x+42
Step 2: Subtract 6x from both sides.
6x+42−6x=6x+42−6x
42=42
Step 3: Subtract 42 from both sides.
42−42=42−42
0=0
Answer:
all real numbers
Step-by-step explanation:
-3 (x - 14) + 9x = 6x + 42
-3 (x - 14) + 9x - 6x = 6x - 6x + 42
-3 (x - 14) + 3x = 42
-3 (x) - 3 (-14) + 3x = 42
-3x + 42 + 3x = 42
3x - 3x + 42 = 42
42 = 42
what is the least common multiple of 6 and 2
1cm(6,2) =
Does x and y vary inversely for each ordered pair?
Mark yes or no please for each answer
Answer:
Step-by-step explanation:
yes
no
no
ye
Please please please help me
I really need to pass this I will give brainliest and a lot of points please just help me solve this correctly
The length of side AB is about 5.87 units.
How to find the side of a right triangle?The triangle ABC is a right angle triangle. A right angle triangle is a triangle that has one of its angles as 90 degrees.
Therefore, let's find the length AB in the right triangle.
Using trigonometric ratios,
cos 33 = adjacent / hypotenuse
Therefore,
Adjacent side = AB
hypotenuse side = 7 units
cos 33° = AB / 7
cross multiply
AB = 7 cos 33
AB = 7 × 0.83867056794
AB = 5.87069397562
AB = 5.87 units
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Suppose MarketOne is a marketing company that has small businesses for clients. MarketOne charges an upfront cost of $350 for new clients and an additional $195 per month to run and maintain the client's website. A linear equation could be used to relate the total cost, in dollars, of MarketOne's services and the number of months that the client's website is running. Which solution is viable for this situation? For full points, write the equation and show your work.
5. A deli bought 45kg of tuna salad R1.48 per kg. In warm weather about 5kg usually spoil before they can be sold. What price per kg will give the desired profit of 40% of selling price?
The deli needs to sell the tuna salad at a price of R2.33 per kg to achieve a profit of 40% of the selling price after 5kg spoilage.
What price per kg will give the desired profit of 40% of selling price?A desired profit also known as target profit means expected amount of profit that the managers of a business expect to achieve by the end of a designated accounting period.
First, let's calculate the cost of the tuna salad the deli purchased:
= 45kg x R1.48/kg
= R66.60
How much tuna salad the deli has left after spoilage:
= 45kg - 5kg
= 40kg
To achieve a profit of 40% of the selling price, the selling price should be 140% of the cost price: which is:
= 140% of cost price
= 1.4 x R66.60
= R93.24
To find the price per kilogram, we divide the selling price by the remaining amount of tuna salad:
= Selling price / Remaining amount of tuna salad
= R93.24 / 40kg
= R2.33/kg
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Answer: 6 dolla per kg
Step-by-step explanation:
. Question 3 Terrance made a list of his expenses. He is creating a check off matrix to organize when his bills are due. A check off matrix is a table without dollar amounts. You can use a matrix to indicate what time of the year an expense will occur Help Terrance complete his check off matrix by placing an X in the correct cells of the table according to his list of expenses, mortgage payment monthly • Utilities, monthly • Insurance quarterly • Internet monthly cell phone monthly . car loan: semiannually lawn care: monthly, April-September • food: monthly day care every other month beginning with February gym membership: annually. July . в тухх, m. AL 10pt Oct Dec Nov Feb Mar Sep Jul Jun Aug May Jan x Expense mortgage payment X X X x x X x insurance y internet cellphone car loan 1 x Iawn care X x X x food X day Care rym membership
=====================================================
Explanation:
The first two rows are already done. They have X's for every month to indicate a monthly payment regularly throughout the year without any extra conditions/requirements.
The third row will have exactly 4 copies of X in it. Two of them are already placed for January and April. The other two payments are in July and October. Notice the months are spaced 3 apart and how 12/4 = 3.
The fourth row will have X's across every cell in the same way the first row does since the internet bill is monthly. The same applies to the cell phone bill and food rows.
Something like the car loan will only have 2 copies of X in that row. Semiannual means twice a year, aka every 6 months. One copy of X is already placed for us in this row. This is in January (month 1). Six months later in month 1+6 = 7 (July) is when the next car loan payment occurs.
Lawn care will have X's only for the months of April through September; any other month won't have an X.
Day care will have X's for February, April, June, August, October, December. We start with February and alternate each month to fill out the rest of the year. This is due to the phrasing "every other month".
The gym membership will have one X for July only, since it's an annual payment.
mrs sen has a swuare piece of cloth of side 100 cm.how many square pieces of cloths of sude 25 cm can be cut from the cloth
Answer:
16 pieces
Step-by-step explanation:
(100*100)-(25*25)=16
what is the range of g Choose 1 answer:
A
3 < 9(x) <4
B
-2 < 9(2) < 8
© -1 < 9(2) < 5
D –2 <9(x) < 5
The range is all Y VALUES, and the graph goes from -1 to 5, so the answer is -1≤x≤5, which I believe is C.
-1≤x≤5 (C)20 points. A certain event may occur, but it is unlikely to occur.
Which statement about the probability of the event is true?
A. The probability is close to 0.
B. The probability is 0.
C. The probability is 1.
D. The probability is less than 0.
Answer:
A
Step-by-step explanation:
Close to 0 means there isn't a certain number, and there also isn't a certain answer for what the probability. While all of the others are alreaady stated, this is the only one that is not.
Please help ill pay u alot of points plz
Which word phrase has the same meaning as y+7
7 added to a number, 7 plus a number, 7 and a number, etc. It's written in many ways.
---
sorry if this doesn't help
Answer:
also you can do the sum of y and 7 or y increased by 7
7 added to y
Question 4Mple Choice Worth 2 points)
Ares of Polygons and Composite Figures MC)
A composte figure is shown
024413
028.445²
1.15 in
Which of the following represents the total area of the figure?
010 663 ²
034.335 ²
4.6 in.
3h 563
P
The total area of the composite figure which has triangle and rectangle is 24.41 square inches
The given composite figure has two triangles and one rectangle
Area of rectangle =length × width
=4.6×3.15
=14.49 square inches
Area of left side triangle, it has base of 3.3 in and height 3.15 inches
Area of triangle = 1/2×3.3×3.15
=5.1975 square inches
Area of triangle on right side
Base = 3 in
Height = 6.3-3.15=3.15 in
Area of triangle = 1/2×3×3.15
=4.725 square inches
Total area = 14.49 + 5.1975 + 4.725
=24.41 square inches
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Find the length of the third side. If necessary, round to the nearest tenth. 9 12
The required length of the third side of the right-angle triangle is 15 units.
What are Pythagorean triplets?In a right-angled triangle, its sides, such as the hypotenuse, are perpendicular and the base is Pythagorean triplets.
Here,
For the right triangle lenght of the two legs to be 9 and 12 units, a measure of the third side is to be determined.
So, Applying the Pythagoras theorem,
h² = p² + b²
h = √9² + 12²
h = √225
h = 15
Thus, the required length of the third side of the right-angle triangle is 15 units.
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6-2(a+8)>18? Can anyone help me?
Answer:
6-2(a+8) >18
6 - 2a-16 >18
- 10- 2a > 18
- 2a > 18+10
-2a > 28
a < -14
..........
please help urgently
Answer: no real solution
Thus, the function has no x- intercept
Step-by-step explanation:
solve x and y for 5x−y=44−3=−3x−y=−12
The values of the variables are;
x = 7
y = -9
How to solve for the variablesFrom the information given, we have that;
5x−y=44
−3x−y=−12
Using the elimination method of solving simultaneous equations
Subtract equation (2) from equation (1), we get;
5x - y - (-3x - y) = 44 - (-12)
Now, expand the bracket
5x - y+ 3x + y = 56
collect the like terms
5x + 3x = 56
add the terms
8x = 56
Make 'x' the subject of formula
x= 7
Now, substitute the value of x in equation (2)
-3x - y = -12
-3(7) - y = -12
expand the bracket
-21 - y= - 12
collect like terms
-y = 9
y = -9
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if you take away 25 from a number you will be left with two and halftimes 30. what is the number?
The rational function has an x-intercept at (-2,0) and vertical asymptotes at x = 5 and x = 1.
Write an equation that could represent this function.
The equation f(x) = k * (x + 2) / [(x - 5) * (x - 1)] could represent the given rational function with an x-intercept at (-2, 0) and vertical asymptotes at x = 5 and x = 1.
To write an equation that represents the given rational function with an x-intercept at (-2, 0) and vertical asymptotes at x = 5 and x = 1, we can start by considering the factors in the numerator and denominator of the function.
Since the function has an x-intercept at (-2, 0), it means that the numerator of the function has a factor of (x + 2).
Since the function has vertical asymptotes at x = 5 and x = 1, it means that the denominator of the function has factors of (x - 5) and (x - 1).
Putting these factors together, the equation that could represent this function is:
f(x) = k * (x + 2) / [(x - 5) * (x - 1)]
Here, k represents a constant multiplier that scales the function, and it can be any non-zero constant value.
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Bandhan Bank employee salary after 10 years
Answer:
- Banking Operations salary in India with less than 1 year of experience to 10 years ranges from ₹ 1.4 Lakhs to ₹ 7 Lakhs with an average annual salary of ₹ 3.1 Lakhs based on 261 latest salaries
Use the following information to determine your answer: The length of a movie falls on a normal distribution. About 95% of movies fall between 75 minutes and 163 minutes.
What is the value of the standard deviation for average movie length in minutes? Please round to the second decimal place.
Answer:
\( 75= 119 -1.96 \sigma\)
\( \sigma = \frac{75-119}{-1.96}= 22.45\)
And tha's equivalent to use this formula:
\( 163= 119 +1.96 \sigma\)
\( \sigma = \frac{163-119}{1.96}= 22.45\)
Step-by-step explanation:
For this case the 95%of the values are between the following two values:
(75 , 163)
And for this case we know that the variable of interest X "length of a movie" follows a normal distribution:
\( X \sim N( \mu, \sigma)\)
We can estimate the true mean with the following formula:
\(\mu = \frac{75+163}{2}= 119\)
Now we know that in the normal standard distribution we know that we have 95% of the values between 1.96 deviations from the mean. We can find the value of the deviation with this formula:
\( 75= 119 -1.96 \sigma\)
\( \sigma = \frac{75-119}{-1.96}= 22.45\)
And tha's equivalent to use this formula:
\( 163= 119 +1.96 \sigma\)
\( \sigma = \frac{163-119}{1.96}= 22.45\)
Which graph is defined by f(x) = x²-x-2|?
O A.
О в.
OC.
O D.
graph A
graph B
graph C
graph D
If the ratio of boys to girls in the sixth-grade chorus is 2 to 3, which choice shows possible numbers of the boys and girls in the chorus? please answer
Answer:
4 to 6
Step-by-step explanation: