Answer:
$25 each ticket!
Step-by-step explanation:
6*4=24
124-24=100
100/4=25
Identify the triangle PQR as isosceles (two sides of equal length), equilateral (three sides of equal length), or a scalene triangle (three sides of different lengths). P(negative 4,9), Q(0,8), and R(negative 3,5)
Answer:
Isosceles
Step-by-step explanation:
In order to figure what type of triangle this is out, we need to start by plotting the given points. That will help us visualize the triangle better and see if our conclusions make sense. (See attached picture).
Once we got the triangle, the strategy to follow is to use the distance between two points formula to see what the measurement of each side of the triangle is. This will help us determine if 2, 3 or none of the sides of the tirangle are the same.
The distance formula is the following:
[tex]distance=\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}[/tex]
so now we can find the desired distances, let's start with the distance between P and Q:
[tex]|PQ|=\sqrt{(-4-0)^{2}+(9-8)^{2}}[/tex]
which yields:
[tex]|PQ|=\sqrt{17}[/tex]
next, let's find the distance between P and R:
[tex]|PR|=\sqrt{(-4-(-3))^{2}+(9-5)^{2}}[/tex]
which yields:
[tex]|PR|=\sqrt{17}[/tex]
and finally the distance between Q and R:
[tex]|QR|=\sqrt{(0-(-3))^{2}+(8-5)^{2}}[/tex]
which yields:
[tex]|QR|=3\sqrt{2}[/tex]
As you may see from the result, only two of the three sides are the same, |PQ| and |PR|, so this will be an Isosceles triangle.
A very large study showed that aspirin reduced the rate of heart attacks by 44%. A pharmaceutical company thinks they have a drug that will be more effective than aspirin, and plans to do a randomized clinical trial to test the new drug. State the null hypothesis and the alternative hypothesis they should use for completing a hypothesis test.
Answer: [tex]H_0:\mu=0.44\ ,H_a:\mu<0.44[/tex]
Step-by-step explanation:
Since we have given that
A very large study showed that aspirin reduced the rate of heart attacks by 44%.
we claim that they have a drug that will be more effective than aspirin.
so, our hypothesis would be
[tex]H_0:\mu=0.44\\\\H_a:\mu<0.44[/tex]
So, it will be one tail test.
Hence, [tex]H_0:\mu=0.44\\\\H_a:\mu<0.44[/tex]
The null hypothesis (H0) for this clinical trial would state that the new drug is no more effective than aspirin at reducing heart attacks (reduction rate is 44% or less). The alternative hypothesis (Ha) would claim that the new drug is more effective than aspirin (reduction rate greater than 44%).
Explanation:In this context, the null hypothesis (H0) and the alternative hypothesis (Ha) are representations of scenarios that the researchers are trying to investigate through their study. The null hypothesis is typically a statement of no effect or no difference while the alternative hypothesis represents the scenario where there is an effect or difference.
For this case, we could state:
Alternative Hypthesis (Ha): The new drug is more effective at reducing heart attacks than aspirin (i.e., the reduction rate is greater than 44%).
These hypotheses set the stage for the pharmaceutical company to analyze the study's data and determine which hypothesis is most supported by the evidence presented.
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A barrel contains 10 red balls, 11 blue balls, and 23 green balls. You start taking balls out. How many do you need to remove, at minimum, to ensure you have taken out at least one of each color?
Answer:
The answer is3
Step-by-step explanation:
because there is three colors
Answer:
22.
Step-by-step explanation:
You might take 10 red balls out in the first 10 picks. Now you are left with 11 blue and 23 green and you might take out the 11 blue in 11 picks. The next pick must be green.
So the answer is 10 + 11 + 1 = 22 balls.
Use the formula to find the length of the radius if the area is 25 square centimeters.
Round your final answer to the nearest tenth of a centimeter. [tex]\sqrt{\frac{a}{\pi }[/tex]
A circle has radius r. The area of this circle can be found using the formula
[tex]A=\pi r^{2}[/tex]
Answer:r = 2.81 centimeters
Step-by-step explanation:
The area of this circle can be found using the formula
A=πr^2
Where r = radius of the circle
π is a constant whose value is 3.14
We are given the area of the circle to be 25 square centimeters. To determine the length of the radius of the circle , we will make r the subject of the formula
r^2 = A/π
Taking square root of both sides of the equation,
r = √A/π
Since A = 25 and π = 3.14,
r= √25/3.14
r = 2.82166323992
Approximating to the nearest tenth of a centimeter,
r = 2.81 centimeters
The physical plant at the main campus of a large state university receives daily requests to replace fluorescent light bulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 63 and a standard deviation of 6. Using the 68-95-99.7 rule, what is the approximate percentage of light bulb replacement requests numbering between 63 and 75? _________ % (Round your answer to the nearest tenth of a percent)
Approximately 81.5% of the daily light bulb replacement requests in the state university's physical plant can be expected to number between 63 and 75.
Explanation:The question is asking for the percentage of daily light bulb replacement requests numbering between 63 and 75 at a state university's physical plant. This can be answered using the 68-95-99.7 rule, also known as the Empirical Rule, which applies to a bell-shaped distribution.
Firstly, identify that a request count of 75 is two standard deviations above the mean (63 + 6*2 = 75), because the standard deviation here is 6. According to the Empirical Rule, approximately 95% of the data lies within two standard deviations of the mean.
However, we are only interested until the upper limit of 75 and not the lower limit (63 - 6*2 = 51). Therefore, we consider half of this 95%, which gives us 47.5%. However, don't forget to include the 34% that lies within the first standard deviation (from 63 to 69). Therefore, approximately 81.5% of the light bulb replacement requests should number between 63 and 75.
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the approximate percentage of light bulb replacement requests numbering between 63 and 75 is 47.5%.
Using the Empirical Rule:
Calculate the Z-scores for the given values: Z(63) = (63-63)/6 = 0 and Z(75) = (75-63)/6 = 2.Look up the percentage of data within these Z-scores: Between Z = 0 and Z = 2 is approximately 47.5%.Therefore, the approximate percentage of light bulb replacement requests numbering between 63 and 75 is 47.5%.On the square baseball diamond shown below, the distance from first base to second base is 90 feet. How far does the catcher have to throw the ball from home plate to reach second base? Round your answer to the nearest 10th. Show your work
Answer:
127.3 ft
Step-by-step explanation:
The diagonal of a square is √2 times the length of one side. The distance from home plate to second base is ...
(90 ft)√2 ≈ 127.3 ft
The catcher at home has to throw the ball 127.3 ft to reach second base.
A jar contains 8 red marbles and y white marbles. If Joan takes 2 random marbles from the jar, is it more likely that she will have 2 red marbles than that she will have one marble of each color?
(1) y ≤ 8
(2) y ≥ 4
Answer:
a) y </= 8 is not sufficient
b) y >/= 4 is sufficient (y is not less than 3.5)
Step-by-step explanation:
Number of Red marbles = 8
Number of white marbles = y
Total number of marbles in the jar = 8+ y
Let Pr(R) be the probability of picking red marbles
Let Pr(W) be the probability picking white marbles
Pr(R) = 8/ (8+y)
Pr(W) = 7/(7+y)
Pr(RR) = Pr(R1) * Pr( R2)
= 8/(8+y) * 7/(7+y)
Pr(RW) = Pr(R1) * Pr(W2) + Pr(W1) * Pr(R2)
= 2[Pr(R1) * Pr(W2)
= 2[8/(8+y) * y/(7+y)]
The probability of having 2 red is greater than one marble of each color.
Pr(RR) > Pr( RW)
8/(8+y) * 7/(7+y) > 2[8/(8+y) * y/(7+y)]
7/(7+y) > 2(y/(7+y)
7/y > 2
7/2 > y
3.5 > y
y < 3.5
Therefore;
a) y </= 8 is not sufficient
b) y >/= 4 is sufficient (y is not less than 3.5)
The radius of a circular disk is given as 25 cm with a maximal error in measurement of 0.3 cm. Use differentials to estimate the following. (a) The maximum error in the calculated area of the disk. (b) The relative maximum error. (c) The percentage error in that case.
Answer with Step-by-step explanation:
We are given that
Radius of circular disk=r=25 cm
Maximal error in measurement of radius =[tex]\Delta r=[/tex]0.3
We know that
Surface area of circle =A=[tex]\pi r^2[/tex]
Differentiate w.r.t r
a.Maximum error=[tex]dA=2\pi rdr[/tex]
Substitute the values then we get
[tex]dA=2\times 3.14\times 25\times 0.3=47.1 cm^2[/tex]
Hence, the maximum error in area of disk=[tex]47.1 cm^2[/tex]
b.
Relative error in A: [tex]\frac{\Delta A}{A}=\frac{2\pi r\Delta r}{\pi r^2}[/tex]
Substitute the value in the formula
Then ,we get
Relative maximal error in area of disk=[tex]\frac{2\cdot 25}{(25)^2}(0.3)=0.024[/tex]
Hence, the relative maximum error in area of disk=0.024
c.Relative error percentage in area of disk=[tex]\frac{\Delta A}{A}\times 100[/tex]
Substitute the values then we get
Relative error percentage in area of disk=[tex]0.024\times 100=2.4[/tex]%
Hence, the percentage error in area of disk=2.4%
To estimate the maximum error in the calculated area of a disk, use differentials. The maximum error in the area is approximately 15π cm². The relative maximum error is 0.24 and the percentage error is 24%.
Explanation:To estimate the maximum error in the calculated area of the disk, we can use differentials. The formula for the area of a disk is A = πr², where r is the radius. Taking the differential of this equation gives dA = 2πr dr. Since the maximum error in the radius is 0.3 cm, we substitute dr = 0.3 cm into the equation to find the maximum error in the area. Thus, the maximum error in the calculated area of the disk is approximately 2π(25 cm)(0.3 cm) = 15π cm².
The relative maximum error is the ratio of the maximum error in the area to the actual area. Therefore, the relative maximum error can be calculated as (15π cm²) / (π(25 cm)²) = 15 / 25² = 0.24.
To calculate the percentage error, we multiply the relative maximum error by 100%.
Thus, the percentage error is 0.24 * 100% = 24%.
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Yesterday evening, Emily's journey home took 25% longer than usual, as she was stuck in a traffic jam. By what percentage was her average speed reduced compared to normal
Answer:
20%
Step-by-step explanation:
Time and speed are inversely proportional, so if Emily's time was 5/4 of normal, her speed was 4/5 of normal, or 1/5 = 20% below normal.
Suppose you begin a job with an annual salary of $32,900. Each year you are assured of a 5.5% raise. What its the total amount that you can earn in 15 years? A) $34,815 B) $51,751 C) $737,245 D) $1,682,920
Answer: The correct option is C
Step-by-step explanation:
You begin a job with an annual salary of $32,900
Each year you are assured of a 5.5%. If you get the same amount each year, that is a 100% payment. It is neither reducing nor increasing. But with an increase of 5.5% each year, it means you are getting (100+5.5)% each year. This equals 105.5%. So for each year, you get 105.5% of the previous year.
This is a geometric progression. To determine the total amount that you can earn in 15 years, we will find the sum of 15 terms, S15 of the series. The formula for sum of the nth term of a geometric progression is expressed as
Sn = [a(r^n - 1)] / r - 1
Where
Sn = sum of the nth terms of the series
a = the first term(salary of the first year
r = common ratio
n = number of years.
From the question,
a = 32900
n = 15
r = 105.5/100 = 1.055
S15 = [32900(1.055^15 - 1)] / 1.055 - 1
S15 = [32900(2.23247649224 - 1)] / 0.055
S15 = [32900 × 1.23247649224] / 0.055
S15 = $737245
Maryam’s wallet contains a combination of $5 and $10 bills. What is the ratio of $5 bills to $10 bills? (1) The ratio of the number of bills to the total dollar value is 1/9. (2) The total dollar value of the bills is $360.
The problem requires finding the ratio of $5 bills to $10 bills given certain conditions. It involves solving two equations and is typically encountered in a high school Mathematics course.
Explanation:The SUBJECT
of Maryam's question involves the field of
Mathematics
, more specifically it belongs to the area of
ratios and proportions
. The problem presents a scenario where she has a combination of $5 and $10 bills in her wallet. Then, given are two conditions - (1) 'The
ratio
of the number of bills to the total dollar value is 1/9.' and (2) 'The total dollar value of the bills is $360.' We are asked to determine the ratio of $5 bills to $10 bills.
Represent $5 bills as 'x' and $10 bills as 'y'. Firstly, considering condition (1), we know that the total number of bills (x + y) divided by the total value (5x + 10y) is 1/9. Secondly, from condition (2), we have that the total dollar value, i.e., 5x + 10y equals $360. By solving these two equations, the values of 'x' and 'y' can be found, and thus, the required ratio will be x:y.
However, the problem requires solving two equations which is a skill typically taught and applied in high school Mathematics courses.
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Joe had eight sections of the fence to paint. He painted 2/3 of each section in one hour. How many hours did it take him to paint all the sections of fence?
Answer:
1.5 hours
Step-by-step explanation:
Since Joe painted 2/3 section (2 out of 3 sections) of each section, we can break up the sections into parts of "3".
So 8 sections would have total subsections of 8 * 3 = 24 subsections
He painted 2 subsections of each of the 8 sections, so number of subsections painted would be:
8 * 2 = 16 subsections
There are more 24 - 16 = 8 more subsections to paint
If 1 hour means 16 subsections,
1/16 hour = 1 subjection
Thus,
8 remaining subsections would take:
8 * 1/16 = 8/16 = 1/2 hour
So
Initially 1 hour, then 1/2 hour, so total of 1 + 1/2 = 1.5 hours
So, to paint all sections, he took 1.5 hours
A box (with no top) is to be constructed from a piece of cardboard of sides A and B by cutting out squares of length h from the corners and folding up the sides. Find the value of h that maximizes the volume of the box if
A = 7 and B = 12
Answer:
h = 1,743
Step-by-step explanation:
Volume of a box is
V(h) = ( A - 2h) * ( B - 2h)* h A = 7 B = 12
We have
V(h) = ( 7 - 2h) * ( 12 - 2h ) * h
V(h) = ( 84 - 14*h - 24*h + 4*h² ) * h
V(h) = ( 84 - 38*h + 4 *h² ) * h ⇒ V(h) = 84h - 38h² + 4h³
Taking derivatives both sides of the equation
V´(h) = 84 - 76h + 12x²
V´(h) = 0 84 - 76h + 12x² = 0 42 - 38h + 6x²
3x² - 19h + 24 = 0
Solving for h h1 = [ ( 19 + √(19)² - 288 ]/ 6 h1 = [ (19 + √73)/6]
h₁ = 4,59 we dismiss this value since 9,18 (4,59*2) > A
h₂ = [ 19 - √73)/6] h₂ = 1,743
h = 1.743 is h value to maximizes V
A certain component is critical to the operation of an electrical system and must be replaced immedi- ately upon failure. If the mean lifetime of this type of component is 100 hours and its standard devi- ation is 30 hours, how many of these components must be in stock so that the probability that the system is in continual operation for the next 2000 hours is at least .95?
Answer:
n=23
Step-by-step explanation:
Answer explained in the attachment .
help me figure out this problem!!
Answer:
4.47 years
Step-by-step explanation:
Fill in the given value of P and solve for t.
15390 = 19000·0.954^t
15390/19000 = 0.954^t
Taking logarithms ...
log(1539/1900) = t·log(0.954)
t = log(1539/1900)/log(0.954) ≈ 4.47 . . . years
Assume that IQ scores are normally distributed, with a standard deviation of 11 points and a mean of 100 points.
If 85 people are chosen at random, what is the probability that the sample mean of IQ scores will not differ from the population mean by more than 2 points?
Answer: Our required probability is 0.91.
Step-by-step explanation:
Since we have given that
n = 85
mean = 100 points
standard deviation = 11
We need to find the probability that the sample mean will not differ from the population mean by more than 2 points.
so, it becomes,
[tex]P(100-2<\bar{x}<100+2)\\\\=P(98<\bar{x}<102)\\\\=P(\dfrac{98-100}{\dfrac{11}{\sqrt{85}}}<Z<\dfrac{102-100}{\dfrac{11}{\sqrt{85}}})\\\\=P(-1.68<Z<1.68)\\\\=P(z<1.68)-P(z<-1.68)\\\\=0.9535-0.0465\\\\=0.9070\\\\\approx 0.91[/tex]
Hence, our required probability is 0.91.
Jan sold for more than three times the number of magazines Mel sold during the school fundraiser Morgan sold 40 more magazines then melt if Jen and Morgan sold the same number of magazines how many did Mel sell
Answer: eyyyyyy my name is Jan what a coincidence
Step-by-step explanation:
Solve for x: 5/8=x-1/9
A. 37/8
B. 23/4
C. 11/2
D. 53/8
Answer:
53/72
Step-by-step explanation:
5/8 = x - 1/9
+1/9 +1/9
5/8 + 1/9 = x
9(5/8) + 8(1/9)
45/72 + 8/72
x= 53/72
What percent of 71 is 90?
of 71 is 90.
Answer: 126.76056338%
Step-by-step explanation: To answer the question what percent of 71 is 90, we translate the question into an equation.
We have "what percent" which we can represent by the variable X. Next we have "of 71" which means "times 71" and "is 90" means "equals 90."
Now to solve for x, since x is being multiplied by 71, we need to divide by 71 on both sides of the equation.
On the left side of the equation the 71's cancel and we have x. On the right side of the equation we have 90 divided by 71 which is 1.2676056338.
Now, remember that we want to write our answer as a percent. To write 1.2676056338 as a percent, we move the decimal point two places to the right and we get 126.76056338%.
Answer:
78.89%
Step-by-step explanation:
Find the missing side length
Answer:
The answer to your question is b = 148.5
Step-by-step explanation:
To solve this problem, use trigonometric functions
tan Ф = [tex]\frac{opposite side}{adjacent side}[/tex]
opposite side = b
adjacent side = 60
tan Ф = tan 68° = 2.48
Opposite side = adjacent side x tan Ф
Opposite side = 60 x 2.48
Opposite side = b = 148.5
Answer: 24.24 (24 to the nearest whole number)
Step-by-step explanation:
Following trigonometric rule,
Tan tita = opposite side/ adjacent side
Tan 68° = 60 / b
2.475 = 60 / b
By cross multiplication,
2.475b = 60
Divide both sides by 2.475
2.475b/2.475 =60/2.475
b = 24.24
Hence, adjacent side = 24.24 (24 to the nearest whole number since opposite side is in whole number).
A rectangular piece of sheet metal has a length that is 10 10 in. less than twice the width. A square piece 5 5 in. on a side is cut from each corner. The sides are then turned up to form an uncovered box of volume 1210 1210 in. cubed in.3 Find the length and width of the original piece of metal.
Answer:
length: 32 inwidth: 21 inStep-by-step explanation:
If the width of the original piece of sheet metal is x, then the length is 2x-10. Subtracting a 5" square from each corner makes the bottom of the box have dimensions (x-10) and (2x-20). The volume of the box is then ...
5(x -10)(2x -20) = 1210 . . . . . . volume is the product of the dimensions
10(x -10)² = 1210 = 10(11²) . . . . factor the equation
(x -10)² = 11² . . . . . . . . divide by 10
x = 11 + 10 = 21 . . . . . .take the square root, add 10
The length and width of the original piece of sheet metal were 32 inches and 21 inches, respectively.
The country A Consumer Price Index is approximated by the following formula, where t represents the number of years after 1990.
a(t)=100e^0.023t
For instance, since A(16) is about 144, the amount of goods that could be purchased for $100 in 1990 cost about $144 in 2006. Use the function to determine the year during which costs will be 90% higher than in 1990.
2012
Step-by-step explanation:
cuz 16 years mande the increase so much the years are making money go worthless faster and faster
Using the given exponential function model for Consumer Price Index (CPI), one can conclude that the costs were approximately 90% higher than 1990 in country A in the year 2018.
Explanation:This question is related to
exponential functions
in Mathematics. The formula given, a(t) = 100e^0.023t, is an exponential function representing the Consumer Price Index (CPI) of country A. In this context, a 90% increase from 1990 corresponds to a cost of $190, as 90% of $100 is $90, and this added onto the initial $100 gives us $190. So, you are looking for the year (t) when a(t) = 190.
This requires simplifying the equation 190 = 100e^0.023t. First, divide by 100 to get 1.9 = e^0.023t. Then take the natural log of each side to get ln(1.9) = 0.023t. Now solve for t by dividing ln(1.9) by 0.023 which gives you approximately 28.71 years. As the question measures years after 1990, add this to 1990 to determine the year costs were 90% higher. This gives us the year 2018 (since we cannot have a fraction of a year) that the goods will cost 90% more than in 1990.
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If 2/5 cup of coconut shavings covers 1/4 of a cake, then how much coconut shavings are needed for one cake? A. 3/5 cup B. 5/8 cup C. 1 3/5 cup D. 10 cups
The right answer is Option C.
Step-by-step explanation:
Given,
2/5 cup of coconut shavings covers 1/4 of a cake,
[tex]\frac{2}{5}\ coconut\ shavings=\frac{1}{4}\ of\ cake[/tex]
For one whole cake, we will multiply both sides with 4;
[tex]4*\frac{2}{5}=\frac{1}{4}*4\\\frac{8}{5} = 1\ cake[/tex]
Writing in simplified fraction form;
[tex]1\ cake = 1\frac{3}{5}\ cups[/tex]
The right answer is Option C.
Keywords: fractions, multiplication
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Suppose you perform an ANOVA on 18 subjects divided evenly into three groups according to age. Reading speed is measured and averaged for each of the three groups. The reading speed for the Young Group is 10; for the Middle Group, 12; and for the Older Group, 13. Your F-obtained is 9.15. This is a significant F-obtained. Which of the following is the correct way to report this finding? A. The Older Group reads significantly faster than any other group. B. The Young Group reads significantly faster than any other group. C. There is a significant difference between the Older Group and the Middle Group. D. There is a significant difference among the reading speeds somewhere.
Answer:
D. There is a significant difference among the reading speeds somewhere.
Hope this helps!
Help please I really need help I need it right now show work please
Answer:
ok with whuth do you need help with
Answer:
The right answer for question 1 is b) -14
Step-by-step explanation:
Since it's a decline, the amount will be negative.
your second question is not clear in the image
3.5 per day for 4 days so multiply 3.5 by 4, which equals: $14
so the overall change is -$14.00
A particular type of 4th grade Achievement Test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10.
What is the probability that a randomly selected student earns a score between 33 and 48?
Answer:
The probability that a randomly selected student earns a score between 33 and 48 is 0.3761
Step-by-step explanation:
We compute the z-score related to some value x as [tex]z=\frac{x-50}{10}[/tex]. The z-score related to 33 is given by [tex]z_{1}=\frac{33-50}{10}=-1.7[/tex] and the z-score related to 48 is given by [tex]z_{2}=\frac{48-50}{10}=-0.2[/tex]. Therefore, the probability that a randomly selected student earns a score between 33 and 48 is given by P(-1.7 < Z < -0.2) = P(Z < -0.2) - P(Z < -1.7) = 0.4207 - 0.0446 = 0.3761.
The probability is 0.3761 (a) that a student scores between 33 and 48 on the 4th grade Achievement Test.
To find the probability that a randomly selected student earns a score between 33 and 48 on the 4th grade Achievement Test, we need to use the properties of the normal distribution.
Step 1 :**Standardize the Scores**:
First, we need to standardize the scores using the formula for z-score:
[tex]\[ z = \frac{x - \mu}{\sigma} \][/tex]
where:
- ( x ) is the score we want to find the probability for,
- [tex]\( \mu \)[/tex] is the mean (50 in this case),
- [tex]\( \sigma \)[/tex] is the standard deviation (10 in this case).
For the lower score [tex]\( x = 33 \)[/tex]:
[tex]\[ z_{\text{lower}} = \frac{33 - 50}{10} = -1.7 \][/tex]
For the upper score [tex]\( x = 48 \)[/tex]:
[tex]\[ z_{\text{upper}} = \frac{48 - 50}{10} = -0.2 \][/tex]
Step 2:**Find the Probability**:
Once we have the standardized scores, we can use a standard normal distribution table or a calculator to find the probabilities associated with these z-scores.
From the z-table or calculator, we find:
- For [tex]\( z_{\text{lower}} = -1.7 \)[/tex], the corresponding probability is approximately 0.0446.
- For [tex]\( z_{\text{upper}} = -0.2 \)[/tex], the corresponding probability is approximately 0.4207.
Step 3 :**Calculate the Probability Between the Scores**:
To find the probability between the two scores, we subtract the probability corresponding to the lower score from the probability corresponding to the upper score:
[tex]\[ \text{Probability} = \text{Probability}(x < 48) - \text{Probability}(x < 33) \][/tex]
[tex]\[ \text{Probability} = 0.4207 - 0.0446 \][/tex]
[tex]\[ \text{Probability} = 0.3761 \][/tex]
So, the correct option is: a) .3761
Complete Question :
A particular type of 4th grade Achievement Test provides overall scores that are normally distributed with a mean of 50 and a standard deviation of 10. What is the probability that a randomly selected student earns a score between 33 and 48?
a) .3761
b) .4207
c) .4653
d) .0446
Carpetland salespersons average $8,000 per week in sales. Steve Contois, the firm’s vice president, proposes a compensation plan with new selling incentive. Steve hopes that the results of a trial selling period will enable him to conclude that the compensation plan increase the average sales per salesperson.
a. Develop the appropriate null and alternative hypotheses.
b. What is the Type I error in this situation? What are the consequences of making this error?
c. What is the Type II error in this situation? What are the consequences of making this error?
The appropriate null and alternative hypotheses for the situation, the consequences of Type I and Type II errors in this context.
Explanation:a. Null Hypothesis (H0): The compensation plan does not increase the average sales per salesperson. Alternative Hypothesis (H1): The compensation plan does increase the average sales per salesperson.
b. Type I error occurs when the null hypothesis is rejected, but it is actually true. In this situation, it means concluding that the compensation plan increases the average sales per salesperson when it does not. The consequence is that the company may implement the compensation plan and incur unnecessary costs.
c. Type II error occurs when the null hypothesis is accepted, but it is actually false. In this situation, it means concluding that the compensation plan does not increase the average sales per salesperson when it actually does. The consequence is that the company may miss out on the benefits of the compensation plan and fail to motivate its salespeople effectively.
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A banana farm received a total of 271 millimeters of rain in March and April. If 118 millimeters of rain fell on the farm in March, how many millimeters of rain fell on the farm in April
Final answer:
The amount of rain that fell on the banana farm in April is 153 millimeters.
Explanation:
To find the amount of rain that fell on the banana farm in April, subtract the amount of rain that fell in March from the total rainfall. The total rainfall in March and April is 271 millimeters, and the amount of rain that fell in March is 118 millimeters. So, the amount of rain that fell in April is 271 millimeters - 118 millimeters = 153 millimeters.
A circular cloud of poison gas from a factory explosion is expanding so that t hours after the explosion the radius of the cloud is R(t)=50+20t meters. How fast is the area of the cloud increasing 5 hours after the explosion?
Answer:
6000π m²/h
Step-by-step explanation:
Area of the circular cloud =πr²----------------------------------------- (1)
Radius as a function of time = R(t)=50+20t------------------------ (2)
dA/dt = (dA/dr) x (dr/dt)-----------------------------------------------------(3)
dA/dr = 2πr
dr/dt = 20
After 5 hours, the radius of the cloud will be :
R(5)=50+20(5)
= 150 meters
Substituting into (3)
dA/dt = 2π(150) x 20
= 6000π m²/h
Please help me with my homework and explain to me how?
Answer:
350
Step-by-step explanation:
If x is the number of hamburgers and y is the number of cheeseburgers, then:
x + y = 764
y = x + 64
Solve the system of equations with substitution or elimination. Using substitution:
x + x + 64 = 764
2x + 64 = 764
2x = 700
x = 350
350 hamburgers were sold.