The initial size of the culture is 464.
The doubling period is 17 minutes approximately.
The population after 65 minutes is 6675.
In 83 minutes the population will reach 14000.
The count of bacteria grows exponentially. So the best suited model for the case is Exponential function.
General form of Exponential model is,
f(t) = A₀ eᵏᵗ, k is growth constant.
We know that count of bacteria was 700 after 10 minutes.
So when t = 10 then f(t) = 700
A₀ e¹⁰ᵏ = 700 ..................... (i)
and again the count of bacteria was 1600 after 30 minutes.
So when t = 30 then f(t) = 1600
A₀ e³⁰ᵏ = 1600 ..................... (ii)
Dividing equation (ii) by equation (i) we get,
(A₀ e³⁰ᵏ)/(A₀ e¹⁰ᵏ) = 1600/700
e²⁰ᵏ = 16/7
20k = ln(16/7)
k = (ln(16/7))/20
k = 0.041 [rounding off to nearest thousandth]
Substituting the value of k in equation (i) we get,
\(A_0e^{10\times 0.041}\) = 700
A₀ = 464.55
So the model is,
f(t) = 464.55 \(e^{0.041t}\)
At initial stage t = 0, so the initial size is,
f(0) = 464 (approximate to nearest integer)
When the size is doubled then it is double of initial size A₀.
2A₀ = A₀\(e^{0.041t}\)
t = 17 (approximate to nearest miniute)
The population after 65 minutes, (t = 65)
f(65) = 6675 (approximate to nearest integer)
Let at t = m time the population will reach 14000.
14000 = 464.55 \(e^{0.041m}\)
m = 83 (approximate to nearest minute)
So in 83 minutes the population will reach 14000.
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For the data set with the value of 70 why would the median be better choice for the measure of center than the mean
The median would be a better choice than the mean for measuring the center of the data set with the value of 70 when its distribution is skewed with some outliers.
What is the difference between median and mean?The median is the middle value in an ordered list of values, while the mean is the average.
The choice of either the median or the mean depends on the distribution of the data values.
When the distribution of the data values is symmetrical without clear outliers, the mean is the better central value to use.
When the distribution of data values is skewed with clear outliers, the median serves as the better central value.
Thus, use the median when the data distribution is skewed with some outliers.
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what is 2+2?
I just cant figure it out.
Answer:4
Step-by-step explanation
If you have 2 fishes in an aquarium and add 2 more fishes to the aquarium you have 4 fishes! :D
Answer:
4
Step-by-step explanation:
Find the derivative of the following function using the chain rule. f(x)=5x^2(x^2−3)^15 f′(x)=(160x^3−30x)(x^2−3)^14 f′(x)=15(20x^3−30x)^14 f′(x)=30x(2x)14 f′(x)=(160x^3+30x)(x^2−3)^14
The derivative of the function f(x) = 5x^2(x^2 - 3)^15 using the chain rule is f'(x) = (160x^3 - 30x)(x^2 - 3)^14.
To find the derivative of the function f(x) = 5x^2(x^2 - 3)^15, we can apply the chain rule. The chain rule states that if we have a composite function, g(h(x)), then the derivative of g(h(x)) with respect to x is given by g'(h(x)) * h'(x).
In this case, we can let g(u) = 5u^15 and h(x) = x^2 - 3. Therefore, f(x) can be rewritten as g(h(x)) = g(x^2 - 3) = 5(x^2 - 3)^15.
Now, let's find the derivative of g(u) and h(x):
g'(u) = 15u^14
h'(x) = 2x
Applying the chain rule, we have:
f'(x) = g'(h(x)) * h'(x)
= 15(x^2 - 3)^14 * 2x
= 30x(x^2 - 3)^14
Simplifying further, we get:
f'(x) = (160x^3 - 30x)(x^2 - 3)^14
Therefore, the derivative of the function f(x) = 5x^2(x^2 - 3)^15 using the chain rule is f'(x) = (160x^3 - 30x)(x^2 - 3)^14.
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0. Michael works in a supermarket. He is paid $10.80 per hour. How much will he earn if he works a 37 hour week?
Answer:
Michael will earn $399.60 for a 37-hour week.
Step-by-step explanation:
\(10.80 \times 37 = 399.60\)
okay so this question is very easy you just supposed to multiple the paid per hour amount with the hours per week.
Data
paid per hour $10.80
find how much for 37 hours
Solution
37 * 10.80
=$399.6
Solve the absolute value equation
algebraically: 3|2x - 3| + 2 = 3
Answer:
\(3 |2x - 3| = 1\)
\(3 |2x - 3| = 1 \\ 6x - 9 = 1 \\ 6x = 10 \\ x = \frac{10}{6} = \frac{5}{3} \)
\(3 |2x - 3| = - 1 \\ 6x - 9 = - 1 \\ 6x = 8 \\ x = \frac{4}{3} \)
\(x = \frac{5}{3} x = \frac{4}{3} \)
I am sorry but I am not sure of this :(
What is 12.70 - n + 9
Answer:
21.7 - n
Step-by-step explanation:
12.7 +9
ANSWER
21.7 - n
The American Medical Association (AMA) wishes to determine the percentage of obstetricians who are considering leaving the profession because of the rapidly increasing number of lawsuits against obstetricians.
The sample size that needs to be taken to find the answer to within ±3% at the 95% confidence level is equal to: (A) 6 (B) 33 (C) 534 (D) 752 (E) 1068
the sample size needed to estimate the percentage of obstetricians considering leaving the profession with a margin of error of ±3% at the 95% confidence level is approximately 1068. The answer is (E).
TheThe sample size required to estimate a proportion with a margin of error of ±3% at the 95% confidence level can be calculated using the formula:
n = (Z α/2)^2 * p(1-p) / E^2
where Z α/2 is the critical value for the standard normal distribution at the 95% confidence level (which is 1.96), ppp is the estimated proportion of obstetricians considering leaving the profession (which we don't know yet), and E is the desired margin of error (which is 0.03).
To maximize the sample size, we assume thatp= 0.5 (since this gives the largest sample size for any given population size). Substituting the values into the formula, we get:
n = (1.96)^2 * 0.5(1-0.5) / 0.03^2
n ≈ 1067.11
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NO ONE IS HELPINGGG MEEEE
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
A rectangle has a length of (3x2 -5x + 7) and a width of (-5x2 + 8x - 2). What is the perimeter of the rectangle?
A.
-4x2 + 6x + 10
B.
8x2 + 13x + 9
C.
-2x2 + 3x + 5
D.
-16x2 + 26x + 11
Answer: D
Step-by-step explanation: Just solve for perimeter of a rectangle by just plugging the side length in with these equations.
ii. exclude the data for azerbaijan, and rerun the regression. do the results change? why or why not?
If the data for Azerbaijan is excluded and the regression is rerun, the results may or may not change depending on the specific factors and variables involved in the regression analysis.
If Azerbaijan had a significant impact on the overall regression, then excluding it could cause a significant change in the results. However, if Azerbaijan did not have a significant impact on the regression, then excluding it may not change the results much.
In summary, the exclusion of Azerbaijan from the regression analysis may or may not change the results, depending on the degree of impact the data had on the model.
When you exclude the data for Azerbaijan and rerun the regression, the results may change depending on the influence of Azerbaijan's data on the overall regression model. If the data for Azerbaijan were outliers or significantly different from the rest of the dataset, removing them might result in a more accurate and better-fitting model. However, if Azerbaijan's data were similar to the rest of the data points, the change might be minimal or negligible. To confirm the impact of excluding Azerbaijan's data, you'll need to compare the coefficients, R-squared values, and other relevant statistics of both models (with and without Azerbaijan's data).
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How do I find the angles
Answer: See attached
Step-by-step explanation:
We can use the knowledge of straight angles being equal to 180° and our knowledge of vertical angles as well as corresponding angles.
See attached for a visual and all the angle measurements laid out.
Antonio wants to subscribe to a service that will allow him to rent DVDs and stream movies online Movie
Madness offers a subscription for $14.25 a month. With this subscription, Antonio can check out as many
DVDs as he wants each month and must pay $1.40 for each movie he streams online. The Show Must Go On!
offers a subscription for $8.50 a month. With this subscription, Antonio can checkout as many DVDs as he
wants each month and must pay $3.25 for each movie he streams online.
Write a system of linear equations to represent this problem situation.
Movie Madness:
The Show Must Go On!
The linear equation that represent this situation is y = 1.4x + 14.25 and y = 3.25x + 8.50
Linear equation
A linear equation is in the form:
y = mx + b
where y, x are variables, m is the slope of the line and b is the y intercept.
Let y represent the subscription for a month for watching x online movies.
For movie Madness:
y = 1.4x + 14.25
For show must go:
y = 3.25x + 8.50
The linear equation that represent this situation is y = 1.4x + 14.25 and y = 3.25x + 8.50
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Which row of the table reveals the x-intercept of function f?
The row of the table that reveals the x-intercept of the function f is given as follows:
Second row.
What are the intercepts of a function?A function has two intercepts, which are listed as follows:
x-intercept.y-intercept.The definition of each type of intercept is given as follows:
x-intercept: values of x when y = 0.y-intercept: value of y when x = 0.From the second row of the table, we have that when x = -4, f(x) = 0, hence the x-intercept of the function is of x = -4.
The y-intercept is of y = -16, as from the fourth row, when x = 0, y assumes a value of 16.
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What is the value of x? Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth. x = m A scalene triangle U V W. Side U V is labeled as 19 meters. Side U W is labeled as x. Angle U is labeled as 81 degrees. Angle V is labeled as 30 degrees.
Answer: 5
Step-by-step explanation:
What is the value of x?
Enter your answer as a decimal in the box. Round only your final answer to the nearest tenth.
x =
m
A scalene triangle U V W. Side U V is labeled as 19 meters. Side U W is labeled as x. Angle U is labeled as 81 degrees. Angle V is labeled as 30 degrees.
Answer: 10.2
I just took the test and this is the correct answer
Which expression is undefined? O A. (0-12) = 6 B. 0 : 5 (3-3 OC. 7 O D. (-2+2)
An undefined equation can be one where the denominator is 0.
SO here in the option d,
\(\frac{8}{-2+2}=\frac{8}{0}\)This expression is undefined. All the other expressions can be solved.
4 strikeouts to 10 strikeouts. What's the percent of change?
Answer:
40%
Step-by-step explanation:
Answer:
Step-by-step explanation:
40%
the diameter of a circle is 12 kilometers. What is the length of a 60 degree arc?
Answer:
Step-by-step explanation:
Find the average rate of change of the function a(x) = πx2 where a is the area of a circle with radius x as the radius changes from x=4 to x=6.
The average rate of change of the given function is 10π.
Given function
a = πx^2
Where a is the area of a circle with radius x
The radius changes from x = 4 to x = 6.
Calculating the average rate of change of function:
The method of finding the average rate between the function value over a certain interval is called the average rate of change.
The formula is given by :
Average = \(\frac{f(b)-f(a)}{b-a}\)
Where f(a) and f(b) are the function value over the limit a and b.
Average = \(\frac{f(6)-f(4)}{6-4}\)
= \(\frac{\pi (6)^{2} -\pi (4)^{2} }{6-4}\)
= \(\frac{\pi (36-16)}{2}\)
= \(\frac{20\pi }{2}\)
= 10π
The average rate of change of the given function is 10π.
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what is the volume of a solid figure with a height of 2 and a square cross-sectional area where the length of the side of a cross-section at
The volume of a solid figure with a height of 2 and a square cross-sectional area where the length of the side of a cross-section is x is 2x^2.
To calculate the volume of the solid figure with a height of 2 and a square cross-sectional area, we need to know the length of the side of the cross-section. Let's assume that the length of the side is x.
The cross-sectional area of the figure is the area of the square, which is x^2. The volume of the figure is the product of the cross-sectional area and the height, which is 2x^2.
Therefore, the volume of the solid figure is 2x^2.
It's important to note that the volume of a solid figure is directly proportional to its cross-sectional area. This means that if we increase the cross-sectional area by a factor of 2, the volume will also increase by a factor of 2. This relationship is because the cross-sectional area determines how much material there is to fill up the space. The larger the cross-sectional area, the more material is needed to fill up the same height, resulting in a larger volume.
In conclusion, the volume of a solid figure with a height of 2 and a square cross-sectional area where the length of the side of a cross-section is x is 2x^2.
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Error using diff
Difference order N must be a positive integer scalar.
Error in Newton_Raphson_tutorial (line 35)
f_prime0 = diff(f,x0,xinc); % compute the
derivative of f, between x0 and xinc
Error in Tutorial_m (line 51)
x = Newton_Raphson_tutorial(H,x0); % call the Newton
Raphson function (Newton_Raphson_tutorial.m)
for Tutorial_main.m
%=========================================================================
% Lecture 16: In Class Tutorial
%
% This function calculates the radial equilibrium function for an axially
% stretched and pressurized thick wall vessel and is part of the set of
% equations you will implement for your vasculature project
%
% Input data:
% luminal pressure (Pi), axial stretch (lambdaz_v)
% material parameters, radii in ktf (Ri, Ro)
%
% Output data:
% approximation of the outer radius, ro
%
% The inverse solution of the radial equilibrium involves finding
% the root of the equation:
% Pi - int_{ri}^{ro} (tqq-trr)/r dr = 0
%===============================
The error message "Difference order N must be a positive integer scalar" is indicating that there is an issue with the input argument for the diff function.
The diff function is used to calculate the difference between adjacent elements in a vector.
In the code you provided, the line that is causing the error is:
f_prime0 = diff(f,x0,xinc);
To fix this error, you need to ensure that the input arguments for the diff function are correct.
To fix this problem, you need to look at the code in the Newton_Raphson_tutorial function and possibly also the Tutorial_m function. You probably get an error when computing the derivative with the 'diff' function.
However, we can offer some general advice on how to fix this kind of error. The error message suggests that the variable N used to specify the difference order should be a positive integer scalar.
Make sure the variable N is defined correctly and has a positive integer value.
Make sure it is not assigned a non-integer or non-scalar value.
Make sure the arguments to the diff function are correct.
The diff function syntax may vary depending on the programming language or toolbox you are using.
Make sure the variable to differentiate ('f' in this case) is defined and suitable for differentiation.
Make sure that x0 and xinc are both positive integer scalars, and that f is a valid vector or matrix.
Additionally, it's important to check if there are any other errors or issues in the code that could be causing this error message to appear.
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simplify 5/6 (-2y + 3)
A n s w e r:
\(-\frac{5y}{3} +\frac{5}{2}\)
The simplification of the given expression 5/6 (-2y + 3) is -1.7y + 2.5.
What is an expression?A mixture of variables, numbers, addition, subtraction, multiplication, and division are called expressions.
An expression is a mathematical proof of the equality of two mathematical expressions.
Given the expression,
⇒ 5/6 (-2y + 3)
⇒ 5/6(-2y) + 5/6(3)
⇒ -2 × 5/6 y + 3 × 5/6
⇒ -5/3 y + 5/2
⇒ -1.7y + 2.5
Hence "The simplification of the given expression 5/6 (-2y + 3) is -1.7y + 2.5".
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Can someone help me p
Answer:
(3.5, -2)
Step-by-step explanation:
that point is where the edge if the rectangle is
you buy 3.7 pounds of trail mix the mix cost 2.92 per pound what is the total price for the mix
Answer
3.7lb=
2.92=
lb=
6.63
Step-by-step explanation:
what is the answer to -3(4-5b+7)
Answer:
-33+15n
Step-by-step explanation:
You will have to first distribute the -3.
-3*4 is equal to -12
-3*-5b is equal to 15b Note: -*-=+
-3*7 is equal to -21
Once you get those numbers you will have a equation like this
-12+15b-21
Combine like terms and you will get -33+15n as you answer
f(n) = 2n− 5; Find f(−8)
Answer:
Step-by-step explanation:
Putting value of n = - 8 in the equation
F(n) = 2n− 5
F(-8) = 2(-8) - 5
= - 16 - 5 = - 21
the hypotenuse of a right triangle is long. the longer leg is longer than the shorter leg. find the side lengths of the triangle.
The side lengths of the triangle are:
Longer side= 36m, shorter side= 27m and hypotenuse=45m
Here, we have,
Let x be the longer leg of the triangle
According to the problem, the shorter leg of the triangle is 9 shorter than the longer leg, so the length of the shorter leg is x - 9
The hypotenuse is 9 longer than the longer leg, so the length of the hypotenuse is x + 9
We know that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. So we can use the Pythagorean theorem:
(x + 9)² = x² + (x - 9)²
Expanding and simplifying the equation:
x² + 18x + 81 = x² + x² - 18x + 81
x²-36x=0
x=0 or, x=36
Since, x=0 is not possible in this case, we consider x=36 as the solution.
Thus, x=36, x-9=27 and x+9=45.
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All methods used for visualizing distributions are based on which of the following? Choose the correct answer below.
A. Make a mark that indicates how many times each value occurred in the data set.
B. Make a histogram of the data.
C. Pick a graph and summarize the data using that graph.
D. Make a dotplot of the data.
B. Make a histogram of the data.It can also be used to detect outliers and to compare distributions of different data sets.
A histogram is a type of graph used to visualize the distribution of a given set of data. It is created by plotting the frequency of occurrence of each data point on a graph, with the x-axis representing the data points and the y-axis representing the frequency of occurrence. The height of the bar above each data point indicates how often the value appears in the data set. The shape of the histogram gives an indication of the underlying distribution of the data. By plotting the frequency of occurrence of each data point, a histogram can provide insights into the mean, median, mode, and other characteristics of the data set. It can also be used to detect outliers and to compare distributions of different data sets.
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A table
cloth is 82 inches
long. What is its length in
feet and inches?
Mr.Rosado is buying a jacket that regularly cost $40. It is on sale for 20% off. The store also adds a tax of 8%. After tax, how much does Mr.Rosado pay for the jacket?
Answer:
$11.20
Step-by-step explanation:
Answer:
$34.56
Step-by-step explanation:
32x.08=2.56
40x.2=8
40-8=32
32+2.56=34.56
What is ASA postulate example?
The ASA (Angle-Side-Angle) postulate states that if two triangles have two congruent angles and a congruent side between them, then the triangles are congruent.
An example of this postulate inaction could be as follows:
Triangle ABC and triangle DEF have two congruent angles (angle A and angle D, and angle B and angle E). They also have a congruent side between them (side AC and side DE). According to the ASA postulate, these two triangles are congruent.
A triangle is a three-sided polygon with three straight sides that are connected at the corners. It is one of the basic shapes in geometry. Triangles can be classified by their sides, angles, or both.
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A poll worker analyzing the ages of voters found that Mu = 65 and Sigma = 5. What is a possible voter age that would give her zx = 1. 14? Round your answer to the nearest whole number. 59 66 71 90.
A poll worker analyzing the ages of voters found that
\(\mu = 65\; \And \; \delta = 5.\) The possible voter age that would give her zx = 1. 14is 71.
Given : that the random variable,
X= the ages of voters Analysis is having mean = 65 Std deviation = 5
According to the given statements ,
X = normal (65,5) Now, we will convert it into Z-score concept ,
\(\rm Z=\dfrac{x-65}{5}\)
We can also write in terms of x as well,
When,
\(\rm z = 1.14 \\\\X = 65+5z\)
So,
\(\rm X=65+5(1.14) = 65+5.7=70.70\)
Therefore,We can also write it by rounding off the value,i.e.=71
The possible voter age that would give her zx = 1. 14is 71.
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Answer:
71
Step-by-step explanation: