The probability that a student chosen at random studies physics and chemistry or both is 35/41 = 0.85
What is the probability?Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.
What is the formula for probability?The formula for probability states that the possibility of an event happening, or P(E), equals the ratio of the number of favorable outcomes to the number of total outcomes. Mathematically, it looks like this: P(E) = favorable outcomes/total outcomes.
The Venn diagram shows:
There are 2 students studying both biology and physics.
Six students study biology and chemistry together.
There are 4 students who study physics and chemistry.
There are 5 students who just study physics.
There are 7 students who just study biology.
There are 8 students who just study chemistry.
There are 6 students that study none.
As a result, there are a total of 41 students, which is equal to 2 + 6 + 4 + 5 + 7 + 8 + 3 + 6 students.
There are 21 students who study chemistry, which is equal to 8 + 6 + 3 + 4 students.
The number of students that studies physics is = 14
The number of students that studies chemistry is = 21
Probability = number of favorable outcomes / total number of outcomes
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A quantity with an initial value of 3600 decays
exponentially at a rate of 1% every 8 days.
What is the value of the quantity after 7 weeks,
to the nearest hundredth?
To the nearest tenth, the quantity of the amount after \(7\) weeks is around \(1804.74\).
What does, for instance, amount mean?Quantity simply refers to how much or how many of anything there are. A quantity can also be an amount, a number, or a measurement. It responds to the "how much?" query. Numbers may also be used to understand quantities, such as this book has 55 pages, this container has 'x' quantities of black pens, etc.
What do numbers in amounts mean?Numbers can be used to express quantities, such as 55 pages or reading. Entire numbers, fractions, fractions, percentages, or units of measurement like space, money, length, or weight can all be used to express these values. Quantities may also be stated using uncommon units.
\(A_{0} = 3600\)
\(r = 0.01\) (since the rate of decay is \(1\)%)
\(t = 7\) weeks \(= 56\) days (since there are \(7\) days in a week)
We can first find the value of \(e^{-rt}\) as follows:
\(e^{-rt} = e^{-0.0187} = 0.5013\)
Substituting into the formula, we have:
\(A = 3600 * 0.5013 ≈ 1804.74\)
Therefore, the value of the quantity after \(7\) weeks, to the nearest hundredth, is approximately \(1804.74\).
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Hannah has liabilities totaling $30,000 (excluding her mortgage of $100,000 ). Her net worth is $45,000. What is her debt-to-equity ratio? 0.75 0.45 0.67 1.30 1.00
Hannah's debt-to-equity ratio when her liabilities was $30,000 (excluding her mortgage of $100,000 ) and her net worth is $45,000 is 0.75.
Debt-to-equity ratio is a financial ratio that measures the proportion of total liabilities to shareholders' equity. To calculate the debt-to-equity ratio for Hannah, we need to first calculate her total liabilities and shareholders' equity.
We are given that Hannah has liabilities of $30,000 excluding her mortgage of $100,000. Therefore, her total liabilities are $30,000 + $100,000 = $130,000.
We are also given that her net worth is $45,000. The net worth is calculated by subtracting the total liabilities from the total assets. Therefore, the shareholders' equity is $45,000 + $130,000 = $175,000.
Now we can calculate the debt-to-equity ratio by dividing the total liabilities by the shareholders' equity.
Debt-to-equity ratio = Total liabilities / Shareholders' equity = $130,000 / $175,000 = 0.74 (rounded to two decimal places)
Therefore, Hannah's debt-to-equity ratio is 0.74, which is closest to option 0.75.
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The following table shows the number of candy bars bought at a local grocery store and the
total cost of the candy bars:
Candy Bars 3
5
Total Cost $6.65
8
$10.45 $16.15
12
$23.75
15
$29.45
20
$38.95
25
$48.45
Based on the data in the table, find the slope of the linear model that represents the cost
of the candy per bar: m =
Answer:
The slope of a linear model can be calculated using the formula:
m = Δy / Δx
where:
Δy = change in y (the dependent variable, in this case, total cost)
Δx = change in x (the independent variable, in this case, number of candy bars)
This is essentially the "rise over run" concept from geometry, applied to data points on a graph.
In this case, we can take two points from the table (for instance, the first and last) and calculate the slope.
Let's take the first point (3 candy bars, $6.65) and the last point (25 candy bars, $48.45).
Δy = $48.45 - $6.65 = $41.8
Δx = 25 - 3 = 22
So the slope m would be:
m = Δy / Δx = $41.8 / 22 = $1.9 per candy bar
This suggests that the cost of each candy bar is $1.9 according to this linear model.
Please note that this assumes the relationship between the number of candy bars and the total cost is perfectly linear, which might not be the case in reality.
1. The sum of x and 10 is -1. Find x.
Answer:
0 ,1cyvkdcbdfiiihh7v6ctc6e5a5ise5aasusti
The wholesale price desk is $153 a certain furniture store marks up the wholesale price by 38% find the price of the desk in the furniture store . Found ur answer to the nearest cent
Answer:
Step-by-step explanation:
10% = 15.30
40%=61.20
1% = 1.53
2%=3.06
61.20+3.06=64.26
153+ 64.26=217.26
Múltiple representación
The given data is used to obtain the equation as y = x - 2 and the table and graph has been drawn clearly.
How to write the equation of a straight line in slope-intercept form?A straight line can be written in the slope-intercept form as, y = mx + c.
In order to obtain the slope, the ratio of the difference of the coordinates are taken and c is the y-intercept which can be found by substituting x = 0 in the equation.
The data is given as below,
slope = 1 and y-intercept = -2.
The equation, graph and table for the given data can be formed as follows,
(a) The slope-intercept equation is y = mx + c, where m is the slope and c is the y-intercept.
Substitute the corresponding values to obtain,
y = 1 × x + (-2)
= x - 2
(b) The graph for the given equation is plotted below as,
(c) The table for the given equation can be formed with different values of x and y as below,
y = x - 2
Substitute x = 0 to get y = -2, x = 1, y = -1 and x = 2, y= 0.
Now, the table can be formed as below,
Hence, the equation is given as y = x - 2 and the graph and table for the equation is drawn properly.
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In ΔKLM, m = 5.2 cm, k = 8.3 cm and ∠L=162°. Find ∠M, to the nearest 10th of a degree.
The measure of angle M in triangle KLM is approximately 47.3 degrees, to the nearest 10th of a degree.
Solving for nearest 10th of degree:
To find the measure of angle M in triangle KLM, we can use the Law of Cosines, which relates the lengths of the sides of a triangle to the cosine of one of its angles. The Law of Cosines states that:
\(c^2 = a^2 + b^2 - 2ab cos(C)\)
where c: length of the side opposite angle C, and a & b are the lengths of the other two sides.
In this case, we wish to find the measure of angle M, which will be opposite the side of length m. We are aware that the lengths of the other two sides, k and l, and measure of angle L. To find l, we use the Law of Cosines:
\(l^2 = k^2 + m^2 - 2km cos(L)\)
Substituting:
\(l^2 = 8.3^2 + 5.2^2 - 2(8.3)(5.2) cos(162 degree)\)
Solve for the l, we get:
l = 10.038 cm
We will use Law of Cosines again to find the measure of angle M:
cos(M) = \((k^2 + l^2 - m^2) / (2kl)\)
Substituting:
cos(M) = \((\)\(8.3^2 + 10.038^2 - 5.2^2)\) \(/ (2(8.3)(10.038))\)
Simplifying:
cos(M) = 0.665
To get the measure of angle M, we take the inverse cosine:
M = 47.3°
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A plant is already 51 centimeters tall, and it will grow one centimeter every month. The plant's height, H (in centimeters), after m months is given by the
following function.
H(m)=51+m
What is the plant's height after 18 months?
M
The height after the 18th month is 69 cm
How to determine the height after the 18th month?The function definition is given as
H(m) = 51 + m
Where m represents the number of months
In this case;
m = 18
So, we have
H(18) = 51 + 18
Evaluate the sum
H(18) = 69
Hence, the height after the 18th month is 69 cm
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I will give brainliest and extra points plz
\(\frac{4}{\sqrt{5}+3}\)
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
The value of given expression is :
\(3 - \sqrt{5} \)
Solution is in attachment ~
The temperature in Anchorage, Alaska, was –3°C in the afternoon. After the sun went down, the temperature dropped 6 degrees.
What was the temperature after the sun went down?
Answer:
Step-by-step explanation:
ion
How to find circumcenter of a triangle with vertices.
Answer:
The circumcenter of a triangle is defined as the point where the perpendicular bisectors of the sides of that particular triangle intersect. In other words, the point of concurrency of the bisector of the sides of a triangle is called the circumcenter. It is denoted by P(X, Y). The circumcenter is also the centre of the circumcircle of that triangle and it can be either inside or outside the triangle.
Step-by-step explanation:
Steps to find the circumcenter of a triangle with vertices are:
Calculate the midpoint of given coordinates, i.e. midpoints of AB, AC, and BC
Calculate the slope of the particular line
By using the midpoint and the slope, find out the equation of the line (y-y1) = m (x-x1)
Find out the equation of the other line in a similar manner
Solve two bisector equations by finding out the intersection point
Calculated intersection point will be the circumcenter of the given triangle
Can someone answer this asap #needhelp thanks
Answer:i think it is 7/3
Step-by-step explanation:
an article reports attendance increased 17% this year,to 5515.what was the attendance before the increase(round your answer to the nearest whole number)
ANSWER:
The attendance before the increase is 4714
STEP-BY-STEP EXPLANATION:
From the statement we can propose the following equation
\(\begin{gathered} x\cdot(1+0.17)=5515 \\ \text{where x is attendance before the increase} \end{gathered}\)solving for x:
\(\begin{gathered} x\cdot(1.17)=5515 \\ x=\frac{5515}{1.17} \\ x=4713.68\cong4714 \end{gathered}\)The diameter of a circle graphed in the xy-plane has endpoints at (-2, -1) and (4,7). Which of the following is an equation of the circle?
A (x + 1)² + (y + 1)² = 25
B (x + 1)² + (y + 1)² = 100
C (x - 1)² + (y - 3)² = 100
D (x - 1)² + (y - 3)² = 25
The required equation of the circle whose endpoint of the diameter (-2, -1) and (4,7) is (x - 1)² + (y - 3)² = 25 . Option D is correct.
Given that,
The endpoints of the circle's diameter (-2, -1) and (4,7).
The equation of the circle is to be determined.
The circle is the locus of a point whose distance from a fixed point is constant i.e center (h, k). The equation of the circle is given by
(x - h)² + (y - k)² = r².
where h, k is the coordinate of the circle's center on the coordinate plane and r is the circle's radius.
Center of the circle(h, k) = (-2 + 4)/2 ,(-1+7)/2
= 1 , 3
Radius of the circle,
\(r^2 =\sqrt{(1+2)^2+(3+1)^2}\\r^2 =\sqrt{9+16} \\r^2 = 25\)
Equation of the circle with center (1, 3)
\(r^2 = (x - 1)^2 + (y-3)^2\)
\(25 = (x - 1)^2 + (y-3)^2\)
Thus, the required equation of the circle whose endpoint of the diameter (-2, -1) and (4,7) is (x - 1)² + (y - 3)² = 25 . Option D is correct.
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AC is a diameter of OE, the area of the
circle is 289 units2, and AB = 16 units.
Find BC and mBC.
B
A
C
E. plssss hurry !!
The measure of arc BC is 720 times the measure of angle BAC.
Given that AC is the diameter of the circle and AB is a chord with a length of 16 units, we need to find BC (the length of the other chord) and mBC (the measure of angle BAC).
To find BC, we can use the property of chords in a circle. If two chords intersect within a circle, the products of their segments are equal. In this case, since AB = BC = 16 units, the product of their segments will be:
AB * BC = AC * CE
16 * BC = 2 * r * CE (AC is the diameter, so its length is twice the radius)
Since the area of the circle is given as 289 square units, we can find the radius (r) using the formula for the area of a circle:
Area = π * r^2
289 = π * r^2
r^2 = 289 / π
r = √(289 / π)
Now, we can substitute the known values into the equation for the product of the segments:
16 * BC = 2 * √(289 / π) * CEBC = (√(289 / π) * CE) / 8
To find mBC, we can use the properties of angles in a circle. The angle subtended by an arc at the center of a circle is double the angle subtended by the same arc at any point on the circumference. Since AC is a diameter, angle BAC is a right angle. Therefore, mBC will be half the measure of the arc BC.
mBC = 0.5 * m(arc BC)
To find the measure of the arc BC, we need to find its length. The length of an arc is determined by the ratio of the arc angle to the total angle of the circle (360 degrees). Since mBC is half the arc angle, we can write:
arc BC = (mBC / 0.5) * 360
arc BC = 720 * mBC
Therefore, the length of the arc BC equals 720 times the length of the angle BAC.
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A side of the triangle below has been extended to form an exterior angle of 159°. Find the value of x
Answer:
x=21°Step-by-step explanation:
From the figure
x+159=180°
(linear pair)
x=180-159
x=21°
hope it helps...
have a great day!!
please help i need this asap
Answer:
The answer is:
\(2480 {cm}^{2} \)
2(y−1)+6y = −10
Solve as Y=?
Answer:
0.111 hope that helps you
Which angle is supplementary to ∠1?
= Problem 1. Let {Xn}=1 be a sequence of random variables such that Xn has N(0,1/n) distribution. Do the Xn have a limit in distribution, and if so, what is it?
F(Y) = (1/2) [ 1 + erf(Y/(√2√n))] We can see that, as n → ∞, the above expression F(Y) approaches the distribution function of N(0,1) distribution which is given by, G(Y) = (1/2) [ 1 + erf(Y/(√2))]
Given a sequence of random variables {Xn} where Xn has N(0,1/n) distribution.
To determine if {Xn} have a limit in distribution and what is it, let us find the distribution function of the sequence.
Suppose F(x) be the distribution function of {Xn} and Y be any real number.
Then, we have,
F(Y) = P({Xn} ≤ Y)
Here,{Xn} ≤ Y
Xn ≤ Y for all n∈N
And we know that Xn has N(0,1/n) distribution, so we can write,
P({Xn} ≤ Y) = \(\int_{-\infty}^{Y}f_{X_n}(x) dx\)
where, \(f_{X_n}(x)\) is the probability density function of Xn which is given by
f_{X_n}(x) = (1/√(2π/n)) e^((-x^2)/(2/n))
Next, we integrate \(f_{X_n}(x)\) with limits -∞ and Y, we get,
\(\int_{-\infty}^{Y}f_{X_n}(x) dx\)
= \(\int_{-\infty}^{Y} (1/\sqrt2\pi/n)) e^{((-x^2)/(2/n))} dx\)
= (1/2) [ 1 + erf(Y/(√2√n))]
where, erf(z) = (2/√π) ∫_{0}^{z} e^(-t^2) dt is the error function.
Now, we have, F(Y) = (1/2) [ 1 + erf(Y/(√2√n))]We can see that, as n → ∞, the above expression F(Y) approaches the distribution function of N(0,1) distribution which is given by,G(Y) = (1/2) [ 1 + erf(Y/(√2))]
Thus, {Xn} has a limit in distribution and it is N(0,1) distribution.
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how can I solve -7(-8+10-5) please explain
Answer:
so is actually bidmas of bodmas however you want to call it but what's in the brackets you always have to do first so what you would do is because as for subtraction comes last you 1st to -8+10 which is to then you do 2-5 which is -3 so then you do -7 times -3 which because if two minuses or times or multiplied like everyone say it would be a positive so that
It's the answer is 21
Step-by-step explanation:
Answer:
21
Step-by-step explanation:
If A and B are complementary angles and A = (8x+20), B = (7x-5) find A
Answer:
m∠A = 60°
Step-by-step explanation:
Complementary Angles add up to 90°
Step 1: Set up equation
8x + 20 + 7x - 5 = 90
Step 2: Solve for x
15x + 15 = 90
15x = 75
x = 5
Step 3: Find m∠A
m∠A = 8x + 20
m∠A = 8(5) + 20
m∠A = 40 + 20
m∠A = 60°
a =
a. 6
b. 9
c. 4
Please find a in the triangle its on my attached file plss
Answer:
Step-by-step explanation:
\(c^{2}+b^{2} = (4+a)^2 \\c = \sqrt{6^2+4^2}\\ c = \sqrt{36+16}\\ c = \sqrt{52} \\c^2 = 52\\a^2 + 6^2 = b^2\\\\52 + a^2 + 36 = 16 + a^2 + 8a\\ 8a = 72\\a = 9\)
Please mark my answer as brainliest .
I start at 5,6 and move 4 units down what will i end up with
Answer:
5,2
Step-by-step explanation:
since you're moving down the y-axis you will subtract 4 from 6 because 6 is on the y-axis
5 stays the same since you're not moving on the x-axis
(5,2)
A spray irrigation system waters a section of a farmer's field. If the water shoots a distance of 85 feet, what is the area that is watered as the sprinkler rotates through an angle of 60 degrees? Use 3.14 for pi . Round your answer to the nearest square foot, and enter the number only.
Answer:
The watered area is approximately 3783 square feet.
Step-by-step explanation:
The area that is watered due to the rotation of the spankler is a circular section area (\(A\)), whose formula is:
\(A = \frac{\theta }{2}\times \frac{1}{360^{\circ}}\times 2\pi \times d^{2}\)
Where:
\(d\) - Water distance, measured in feet.
\(\theta\) - Rotation angle, measured in sexagesimal degrees.
Given that \(d = 85\,ft\) and \(\theta = 60^{\circ}\), the watered area is:
\(A = \frac{60^{\circ}}{2} \times \frac{1}{360^{\circ}}\times 2\pi \times (85\,ft)^{2}\)
\(A \approx 3783\,ft^{2}\)
The watered area is approximately 3783 square feet.
Answer:176
Step-by-step explanation:
6 times 29.33333333333333
What is the volume of the rectangular prism?
^answer:^
~10 cubic feet~
^step by step explanation:^
first, calculate the volume of the front “panel” of the shape. (5 cubic centimeters because 5 times 3 is 15 and 15 times 1/3 is 5. 5 times 2 is 10.
The function LaTeX: f\left(x\right)=-x^2+4f ( x ) = − x 2 + 4 defined on the interval LaTeX: -8\le x\le8− 8 ≤ x ≤ 8 is increasing on the interval LaTeX: \left[A,B\right][ A , B ] and decreasing on the interval LaTeX: \left[C,D\right][ C , D ]. Fill in the blanks below.
Given:
The function is
\(f(x)=-x^2+4\)
It defined on the interval -8 ≤ x ≤ 8.
To find:
The intervals on which the function is increasing and the interval on which decreasing.
Step-by-step explanation:
We have,
\(f(x)=-x^2+4\)
Differentiate with respect to x.
\(f'(x)=-(2x)+(0)\)
\(f'(x)=-2x\)
For turning point f'(x)=0.
\(-2x=0\)
\(x=0\)
Now, 0 divides the interval -8 ≤ x ≤ 8 in two parts [-8,0] and [0,8]
For interval [-8,0], f'(x)>0, it means increasing.
For interval [0,8], f'(x)<0, it means decreasing.
Therefore, the function is increasing on the interval [-8,0] and decreasing on the interval [0,8].
plz help!! (urgent) !!
Answer:
3n
Step-by-step explanation:
n is the middle integer of 3 consecutive even integers.
The difference between 2 consecutive even integers is 2.
The smallest of the 3 integers is n - 2. The greatest of the 3 integers is n + 2.
The sum of the 3 integers is:
n - 2 + n + n + 2 = 3n
How many and what type of solutions does 5x2−2x+6 have?
1 rational solution
2 rational solutions
2 irrational solutions
2 nonreal solutions
Answer:
2 nonreal solutions
Step-by-step explanation:
given a quadratic equation in standard form
ax² + bx + c = 0 (a ≠ 0 )
then the nature of the roots are determined by the discriminant
b² - 4ac
• if b² - 4ac > 0 then 2 real and irrational solutions
• if b² - 4ac > 0 and a perfect square then 2 real and rational solutions
• if b² - 4ac = 0 then 2 real and equal solutions
• if b² - 4ac < 0 then no real solutions
5x² - 2x + 6 = 0 ← in standard form
with a = 5 , b = - 2 , c = 6
b² - 4ac
= (- 2)² - (4 × 5 × 6)
= 4 - 120
= - 116
since b² - 4ac < 0
then there are 2 nonreal solutions to the equation
When y=8, the value of y2−4 is