Answer:
si=part
=2500×0.045×2
=225...
the answer is C
for her science fair project, laura is investigating whether willow pond is a good environment for fish. she tests the ph, or acidity, of the pond water each evening for a week. according to her county's environmental division, willow pond has a ph of 7 about 30% of the time. how likely is it that the pond water will have a ph of 7 in at least 4 out of laura's 5 tests? laura simulates the situation by putting 3 green shells and 7 white shells in a bag. she picks a shell, then returns it to the bag, 5 times. each time a green shell appears, it represents a ph of 7. this table shows the results of 300 trials: number of times a green shell appears 0 1 2 3 4 5 number of trials 50 109 92 40 8 1 based on laura's results, what is the probability that the water in willow pond will have a ph of 7 in at least 4 out of the 5 tests?
The probability that the water in Willow Pond will have a pH of 7 in at least 4 out of 5 tests is approximately 0.0278 or 2.78%
This means that it is not very likely that the pond water will have a pH of 7 in at least 4 out of Laura's 5 tests.
Laura's simulation involves picking a shell from a bag with 3 green shells and 7 white shells.
Each pick represents one of Laura's tests, and picking a green shell represents a pH of 7.
Based on the results of 300 trials, we can calculate the probability of getting at least 4 green shells (pH of 7) out of 5 tests using the binomial distribution formula:
P(X >= 4) = 1 - P(X < 4)
= 1 - (P(X=0) + P(X=1) + P(X=2) + P(X=3))
where X is the number of green shells (pH of 7) in 5 tests.
Using the table, we can see that P(X=0) = 50/300, P(X=1) = 109/300, P(X=2) = 92/300, and P(X=3) = 40/300.
Therefore,
P(X >= 4) = 1 - (50/300 + 109/300 + 92/300 + 40/300) = 0.0278.
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What are 5 sided shapes called?
Which expressions are equivalent to the given expression?
Answer:
The answers are option B and E.
In a bag, there are 2 green, 3 black, and 5 white marbles. Find the following probabilities by selecting a marble at random and THEN selecting another marble at random *without* replacing the first marble. First question: What is the probability of selecting 2 marbles at random that are both black? Second question: What is the probability of first selecting a white marble, then selecting a green marble, then finally selecting another green marble? Third question: What is the probability of selecting 5 marbles, all of them white?
Answer:
Total number of marbles is:
2 + 3 + 5 = 10First question:
P(b and b) = 3/10*2/9 = 1/15Second question:
P(w, g, g) = 5/10*2/9*1/8 = 1/72Third question:
P(5 whites) = 5/10*4/9*3/8*2/7*1/6 = 1/252
PLEASE HELP I NEED TO WRITE AN EQUATION FOR THIS
Answer:
6x- 18
Step-by-step explanation:
let the price of each sketch book be X dollars each
thus for 6 of them the total price was 6x. This was price before the tax
price after the tax = X - 3
total price after the tax = 6x- 18
Info -
6 sketchbooksx = original price$3 dollars off original price for every sketchbooktotal price of the 6 sketchbooks was $18So, this is the equation made to solve the problem.
6(x-3) = 18
If you solve this, then you use the basic equation and integer rules and all that stuff.
6x-18=18 Distributive property to get rid of parenthesis
+18 +18 Add 18 on both sides to get rid of the extra stuff
Then, you divide by 36:
6x=36
\(\frac{6x}{6} = \frac{36}{6}\)
x = $6
Good job! You are correct :D
You roll a number cube one time. What is the probability that you roll a 6 or 4? Enter your answer as a fraction in simplest form.
That's two possibilities of a total of six =
2/6=1/3=33.33%
(1/3)
Consider the following data for a group of 2000 women. Of these women, 16 are known to have breast cancer. All 2000 undergo the same test to determine whether or not they have breast cancer, and 154 test positive. 14 of the 16 that have breast cancer test positive and 140 of those that do not have breast cancer test positive.
Find the probability that a woman has breast cancer given that her test result is positive.
Find the probability that a woman does not have breast cancer given that her test result is negative.
The probability that a woman tests positive given that she has breast cancer is 7/8 and the probability that a woman tests negative for breast cancer given that her test result is negative is 923/1000.
What is probability?Probability is the possibility of happening an event.
Since 14 of 16 have breast cancer test positive, the probability is:
p = 14/16
p = 7/8
Therefore, the probability that a woman tests positive given that she has breast cancer is 7/8.
The number of women who test negative is:
2000 - 154
= 1846
Therefore, 1846 out of 2000 women test negative.
The probability of a woman testing negative is:
p = 1846/2000
p = 923/1000
Therefore, The probability that a woman tests negative for breast cancer given that her test result is negative is 923/1000.
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Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. lim [In(x9 - 1) - In(x5- 1)]
The limit of the given expression as x approaches 1 from the right is 1.8.
To evaluate the limit of the given expression:
\(lim_{x - > 1} + [ln(x ^ 9 - 1) - ln(x ^ 5 - 1)]\)
We can start by directly substituting x = 1 into the expression:
[ln(1⁹ - 1) - ln(1⁵ - 1)]
= [ln(0) - ln(0)]
However, ln(0) is undefined, so this approach doesn't provide a meaningful answer.
To apply L'Hôpital's Rule, we need to rewrite the expression as a fraction and differentiate the numerator and denominator separately. Let's proceed with this approach:
\(lim_{x - > 1}\)+ [ln(x⁹ - 1) - ln(x⁵ - 1)]
= \(lim_{x - > 1}\)+ [ln((x⁹ - 1)/(x⁵ - 1))]
Now, we can differentiate the numerator and denominator with respect to x:
Numerator:
d/dx[(x⁹ - 1)] = 9x⁸
Denominator:
d/dx[(x⁵ - 1)] = 5x⁴
Taking the limit again:
\(lim_{x - > 1}\)+ [9x⁸ / 5x⁴]
= \(lim_{x - > 1}\)+ (9/5) * (x⁸ / x⁴)
= (9/5) * \(lim_{x - > 1}\)+ (x⁸ / x⁴)
Now, we can substitute x = 1 into the expression:
(9/5) * \(lim_{x - > 1}\)+ (1⁸ / 1⁴)
= (9/5) * \(lim_{x - > 1}\)+ 1
= (9/5) * 1
= 9/5
= 1.8
The complete question is:
Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. \(lim_{x - > 1} + [ln(x ^ 9 - 1) - ln(x ^ 5 - 1)]\)
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Write an expression that represents the
perimeter of the figure below.
Answer:
P = 15p - 35
Step-by-step explanation:
Regular means that all sides have the same length
A pentagon has 5 sides
P = 5s
P = 5( 3p -7)
Distribute
P = 15p - 35
In a High School, 60% of the boys play baseball and 24% of the boys play baseball and football. What is the percent of those that play football given that they
also play baseball? Record your answer and fill in the bubbles on the answer document (Enter only a number for your answer.)
Answer:
i play baseball mark me as brainliest thank my answer and rate me as a 5 because im white
Step-by-step explanation:
Consider the following small open economy: с = 200+ 0.69Y I = 80 - 1,000r G = 20 NX = 850.09Ye e = 90 M = 115 YL = 0.5Y - 200r Y = 300 C is consumption spending, I is investment spending, r is the interest rate, G is govern- ment spending, NX is net exports, e is the nominal exchange rate, M is money supply, YL is demand for money, and Y is long-run output. In this economy, the interest rate does not deviate from the foreign interest rate. The price level is fixed and set to one. Note that, in this problem, a decrease in e is synonymous with a depreciation of the nominal exchange rate. 1. Assuming that the economy is in equilibrium, find the value of the interest rate. (6 points) 2. Going from the equilibrium found in Question (1), assuming fixed nominal exchange rates, what is the effect on domestic output if the foreign interest rate increases by 0.05? (6 points) (a) What is the size of the nominal money supply in the new short run equilibrium? (6 points) 3. Going from the equilibrium found in Question (1), assuming flexible exchange rates, what is the effect on domestic output if the foreign interest rate increases by 0.05? (6 points) (a) What is the value of the real exchange rate in the new equilibrium? (6 points)
The interest rate is 10.89%
1. Given,С = 200+ 0.69YI = 80 - 1,000rG = 20NX = 850.09ee = 90M = 115YL = 0.5Y - 200rY = 300Using the equation for National Saving, we get,National Saving = Investment + Government Saving + Net exports(S – I) + (T – G) + (X – M) = 0T = 0, hence (S – I) + (X – M) = 0(1 – t)Y – C – (I + G) + NX = 0Where t = 0, we get,0.5Y – 200r – 200 – 69/100Y + 80 – 850.09e = 0.5Y – 200r – 970.09e – 120 = 0.5Y – 200r – 970.09e – 120 = 0Therefore, Y = 325.0454 - 0.5r + 4.851eThis is the equation for the IS curve.On the other hand, the equation for the LM curve is given by,Ms / P = YL(i)115 / 1 = 0.5Y - 200rTherefore, Y = 400 + 400rThis is the equation for the LM curve.The interest rate is given by the point of intersection of the two curves. Equating Y from both equations, we get,325.0454 - 0.5r + 4.851e = 400 + 400rSolving the above equation for r, we get r = 0.1089 or 10.89%..
The size of the nominal money supply in the new short-run equilibrium is 121.07.
2. From the equilibrium found in Question (1), if the foreign interest rate increases by 0.05, the domestic output will change in two ways, depending on the flexibility of the nominal exchange rate.Flexible Exchange Rates:In this case, the nominal exchange rate will depreciate (e decreases). This will increase net exports and shift the IS curve to the right. The new equilibrium will be at a higher level of output.Real exchange rate will fall.Increase in output will be higher compared to the fixed exchange rate case.Fixed Exchange Rates:In this case, the nominal exchange rate will remain constant. Therefore, there will be no effect on net exports.IS curve will not shift.Real exchange rate will remain unchanged.Increase in output will be less compared to the flexible exchange rate case.The nominal money supply in the new short-run equilibrium will change in the case of Fixed Exchange Rates. In the fixed exchange rate case, the domestic interest rate will increase, leading to an inflow of capital. This will increase the money supply and the LM curve will shift downwards until it intersects the IS curve at the new equilibrium point.
Real exchange rate will remain unchanged.
3. From the equilibrium found in Question (1), if the foreign interest rate increases by 0.05, the domestic output will change in two ways, depending on the flexibility of the nominal exchange rate. Flexible Exchange Rates :In this case, the nominal exchange rate will depreciate (e decreases). This will increase net exports and shift the IS curve to the right. The new equilibrium will be at a higher level of output .Real exchange rate will fall. Value of the real exchange rate in the new equilibrium is 0.891.Fixed Exchange Rates: In this case, the nominal exchange rate will remain constant. Therefore, there will be no effect on net exports.IS curve will not shift.
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Plz help
C. Calculate the area of this figure
D. Calculate the figure of the grey part
Answer:
C. 44
D. 2372
Step-by-step explanation:
c. 1/2 x (8+3) x 4 x 2 = 44
d. (42 x 63) - (22 x 22)= 2372
Multiply 2 by 2 until you get 4 numbers.
I got 1024 but its not right
Answer: 1024
Step-by-step explanation:
2 x 2 is 4
4 x 2 is 8
8 x 2 is 16
16 x 2 is 32
32 x 2 is 64
64 x 2 is 128
128 x 2 is 256
256 x 2 is 512
512 x 2 is 1024
answer the question in the photo
Answer: input is h, output is k
Step-by-step explanation: inserting a number into h will give you your outcome of k in the solution
Answer:
Step-by-step explanation:
determine the level of measurement of the variable below.
There are four levels of measurement: nominal, ordinal, interval, and ratio.
The level of measurement of a variable refers to the type or scale of measurement used to quantify or categorize the data. There are four levels of measurement: nominal, ordinal, interval, and ratio.
1. Nominal level: This level of measurement involves categorical data that cannot be ranked or ordered. Examples include gender, eye color, or types of cars. The data can only be classified into different categories or groups.
2. Ordinal level: This level of measurement involves data that can be ranked or ordered, but the differences between the categories are not equal or measurable. Examples include rankings in a race (1st, 2nd, 3rd) or satisfaction levels (very satisfied, satisfied, dissatisfied).
3. Interval level: This level of measurement involves data that can be ranked and the differences between the categories are equal or measurable. However, there is no meaningful zero point. Examples include temperature measured in degrees Celsius or Fahrenheit.
4. Ratio level: This level of measurement involves data that can be ranked, the differences between the categories are equal, and there is a meaningful zero point. Examples include height, weight, or age.
It's important to note that the level of measurement affects the type of statistical analysis that can be performed on the data.
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Write True or False.
b. The graphical technique used to describe the relationship between two interval (i.e. quantitative) variables is the scatter diagram.
c. When possible, the best way to establish that an observed association is the result of a cause- and-effect relation is by means of the correlation coefficient.
d. Using the regression equation to make predictions for values of the predictor variable outside the range of the observed values of the predictor variable is called extrapolation.
e. All normal distributions are defined by the mean and standard deviation.
f. The length, X, of a fish from a particular mountain lake in Idaho is normally distributed with μ = 8.7 inches and σ = 1.2 inches. X is a discrete variable.
g. Two t-curves have degrees of freedom 10 and 22 respectively. The one with 10 degrees of freedom more closesly resembles the standard normal curve.
h. The correlation between the daily sales of air conditioners and the daily sales of electric fans in July found to be 0.92. A least squares regression line that predicts daily sales of air conditioners (y) from daily sales of electric fans (x) is fitted to the data. An increase in the daily sales of electric fans causes an increase in the daily sales of air conditioners in July
the answer is probably g
how do i solve this question?
Answer:
D
Step-by-step explanation:
Please help me now i need this
The probability that both Event A (the first die is 4 or less) and Event B (the second die is even) will occur is 1/3.
What is the probability that both events will occur?To find the probability that both Event A and Event B will occur, we need to calculate the individual probabilities of each event and then multiply them together.
Event A: The first die is 4 or less.
There are 6 possible outcomes for the first die (numbers 1 to 6), and out of those, 4 outcomes (numbers 1, 2, 3, and 4) satisfy the condition. Therefore, the probability of Event A is 4/6, which simplifies to 2/3.
Event B: The second die is even.
For a fair six-sided die, there are 3 even numbers (2, 4, and 6) out of a total of 6 possible outcomes. Therefore, the probability of Event B is 3/6, which simplifies to 1/2.
To find the probability that both events will occur, we multiply the probabilities of Event A and Event B:
Probability of both events occurring = Probability of Event A * Probability of Event B
P = (2/3) * (1/2)
P = 2/6
P = 1/3
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Let’s dance portfolio answers? precal
A dance portfolio for precaliberence in dance should feature a comprehensive resume, videos of performances, photographs, and any relevant awards or certifications. This combination of elements provides a well-rounded representation of a dancer's skills, accomplishments, and potential.
A dance portfolio is a collection of works that showcases an individual's skills, creativity, and versatility in the field of dance. It is a comprehensive representation of their training, experiences, and accomplishments. As a dancer, my portfolio would include various elements that highlight my precaliberence in dance.
Firstly, I would include a detailed resume outlining my dance education, including the styles I have studied, the instructors I have trained under, and any notable performances or competitions I have participated in. This provides a snapshot of my training and experience.
Next, I would include a compilation of videos showcasing my dance performances. These videos would demonstrate my technical proficiency, artistry, and ability to interpret different styles of dance. They may include solo performances, duets, or group routines, allowing the viewer to witness my versatility and adaptability as a dancer.
Additionally, I would include high-quality photographs capturing dynamic moments from my performances. These images would convey the emotions and expressions that I bring to my dance, as well as demonstrate my stage presence and physicality.
Lastly, I would incorporate any awards, scholarships, or certifications I have received throughout my dance journey. These achievements serve as evidence of my dedication, commitment, and recognition within the dance community.
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can someone help me please?? i really appreciate it
Simplify the scale factor and write it as a proper fraction, improper fraction, or whole number.
Answer:
In summary, the translation and scale factor are:
Translation: (x,y)↦(x+5,y+4)
Scale factor: 2
Step-by-step explanation:
Students in a math class recorded the number of text messages they received the previous day. how many students received at least 10 messages?
Answer:
14 students
Step-by-step explanation:
You didn't include a graph, so I looked up the question to find the graph you are likely talking about.
If this graph does not match, ignore my answer (although the question is exactly the same so I'm guessing it might be the same)
{even if different , conceptually, here is what you do: }
Receiving at least 10 messages includes those who receive 10 messages.
Each X represents 1 student. So, 3 students received exactly 10 messages.
3 (who received 10)
2 (who received 15)
4 (who received 20)
5 (who received 25)
+________
14 students
14 students received ≥ 10 messages
(≥ means greater than or equal to,
< is less than (less < more)
> is greater than (more > less)
the line under includes the value _ (same or more ≥ than this value ; same or less ≤ than this value)
hope this helps you !!
Rachel can finish the job in 5 hours, while Carl can finish the same job in 8 hours. How long will it take them to finish the job together?PLS ANSWER ASAP WILL MARK BRAINLIEST IF CORRECT!!!!
5-7 hours i think, not 100% sure
Step-by-step explanation:
if you have any answer choices can you please list them? I'm not sure if this is correct but I'm guessing it'll take them both 5ish hours. Since Rachel can finish it in 5 hours but Carl takes longer, either they'll get it done in 5 hours or may it'll take a longer like 6 hours if Carl slows Rachel down. hope this helps!
Answer: 3 hours
Step-by-step explanation:
If she can do it in 5 and he, in 8 then subtract 5-8 and you get 3. Together they can complete this in 3 hours. Have a great day!
HELP PLSSS can someone write this in exponential form!!
Answer:
The exponential form is;
6^1/3•t^2/3
Step-by-step explanation:
Here, we want to write the given expression in the exponential form
we have this as;
(6t^2)^1/3
= 6^1/3• t^2(1/3)
= 6^1/3•t^2/3
What are the coordinates of (9,4) after the following translation? *
(x, y) (x - 2, y + 1)
(7,5)
(11,5)
(7,3)
(11,3)
The coordinates of (9,4) after the following translation (x, y) (x - 2, y + 1) is (7,5)
What does a coordinate in mathematics mean?
A group of numbers used to express the divisions of two reference axes' positions along the horizontal and vertical axes of a coordinate plane. frequently represented as the union of x-values and y-values (x,y).
Given that
x = x-2
y = y+1
After this we can convert this (9,4) coordinate in the following translation
9-2 = 7
4+1 = 5
Hence now new coordinate after the translation is (7,5)
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Generalize Knowing all three angle measures
of a right triangle does not determine the exact
side lengths. However, knowing all three side
lengths of a right triangle does determine the
exact angle measures. Explain why.
This is because the Pythagorean Theorem states that the square of the length of the hypotenuse of a right triangle is equal to the sum of the squares of the lengths of the other two sides.
What is Pythagorean Theorem?Pythagorean Theorem is an essential mathematical principle that has been used for centuries. It states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the other two sides. This theorem is named after the ancient Greek mathematician Pythagoras. Using this theorem, one can calculate the length of any side of a right triangle if the lengths of the other two sides are known.
This relationship between the side lengths and the angle measures can be used to calculate the exact angle measures when all three side lengths are known.
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A city has a population of 696,000. The population y increases by 4% each year.
a. Write an exponential function that represents the population after t years.
b. What will the population be after 20 years? Round your answer to the nearest thousand.
a. y =
b. about
Round this number to the nearest thousand, giving the final answer of 839,000.
What is population?Population is the number of people living in a given area at a particular time. It can refer to a geographic region, such as a city, state, country, or the world. It is usually measured as the total number of people within a certain area and can be determined through a variety of methods, such as the census or survey. Population growth and decline are important indicators of a country's economic and social development, as well as its demographics.
a. y = 696,000 * 1.04^t
b. The population after 20 years will be approximately 839,000. This can be calculated by plugging in t = 20 into the exponential function: y = 696,000 * 1.04^20 = 838,903.8. Round this number to the nearest thousand, giving the final answer of 839,000.
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Expanded form for 0.817
Answer:
Your number written in expanded form is:
0.8
+ 0.01
+ 0.007
Answer:
0.8
+ 0.01
+ 0.007
Step-by-step explanation:
I think
y+x^2 -4 simplify the expression
6
5 divided by 1
7 =
y + x² - 4 is already in simplest form and the value of 6/5 ÷ 1/7 is 8.4.
What is simplest form?A fraction with a reasonably prime numerator and denominator is the simplest form. It denotes that the fraction's numerator (upper or top portion) and denominator (lower or bottom portion) share no common component other than 1. A fraction is a value that denotes a portion of a larger whole.
A fraction's simplest form is also known as its reduced form. 3/4 is the simplest form of a fraction with a common component of one, for example. However, because 2/4 can be reduced further and expressed as 1/2, it is not the simplest form. In this case, 1/2 and 2/4 are equivalent fractions.
We have given two question
y + x² - 4 simplify and 6/5 ÷ 1/7 = ?
Lets simplify
y + x² - 4 is already in simplest form
For
6/5 ÷ 1/7
= 6/5 × 7/1
= 42/5
= 8.4
Thus, y + x² - 4 is already in simplest form and the value of 6/5 ÷ 1/7 is 8.4.
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A sample of 40 endangered species was obtained and the length of time (in months) since being placed on the list was recorded for each species. A stemplot of these data follows. In the stemplot, 5|2 represents 52 months. What would be a better way to represent this data set?
The stemplot may not be the most effective way to represent this data set since it can become cumbersome and difficult to interpret, especially for larger data sets.
A better way to represent this data set would be to use a histogram or a frequency table. These methods provide a clearer visualization of the distribution of the data and allow for easier analysis and comparison.
A histogram divides the range of the data into intervals or bins and represents the frequency or count of observations within each bin using bars. This allows for a visual representation of the distribution and helps identify patterns, central tendencies, and potential outliers.
Alternatively, a frequency table can be created by grouping the data into intervals and recording the number of observations falling into each interval. This table provides a concise summary of the data distribution and can be used to calculate various statistical measures.
Both the histogram and the frequency table provide a clearer and more concise representation of the data set, making it easier to analyze and draw insights from the information.
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Solve the following inequality: 38 < 4x+3+7 – 3x.
a. x < 28
b. x > 28
c. x < 4
d. x > 4
To solve the given inequality, first we have to simplify the given inequality.38 < x + 10 After simplification we get, 38 - 10 < x or 28 < x.
The correct option is B.
The given inequality is 38 < 4x + 3 + 7 - 3x. Simplify the inequality38 < x + 10 - 4x + 3 + 7 - 3x38 < -x + 20 Combine the like terms on the right side and simplify 38 + x - 20 < 0 or x + 18 < 0x < -18 + 0 or x < -18. The given inequality is 38 < 4x + 3 + 7 - 3x. To solve the given inequality, we will simplify the given inequality.
Simplify the inequality38 < x + 10 - 4x + 3 + 7 - 3x38 < -x + 20 Combine the like terms on the right side and simplify 38 + x - 20 < 0 or x + 18 < 0x < -18 + 0 or x < -18. Combine the like terms on the right side and simplify38 + x - 20 < 0 or x + 18 < 0x < -18 + 0 or x < -18.So, the answer is x > 28. In other words, 28 is less than x and x is greater than 28. Hence, the answer is x > 28.
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