Find the area of the shade regions. Give your answer as a completely simplify exact value in terms of pie(no approximation). a=
Answers
Answer:
41.87 cm²
Step-by-step explanation:
Area of shaded region :
Area (sector of radius 7 cm) - Area (sector of 3 cm)π × θ/360° (r₁² - r₂²)3.14 x 120/360 (49 - 9)3.14 x 1/3 x 40125.6/341.87 cm²Related Questions
Each of the teams in a mixed volleyball league consists of 5 men and 5 women. there are 9 men and 10 women, including julia, who are trying out for a team. how many possible teams would include julia? 15,876 31,752 45,722,880 457,228,800
Answers
Using the combination formula, it is found that 15,876 teams would include Julia.
The order in which the people are chosen to the team is not important, hence the combination formula is used to solve this question.
What is the combination formula?[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by:
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
In this problem:
5 men are chosen from a set of 9.4 women are chosen from a set of 9(as Julia is already on the team).Hence the number of teams is given by:
[tex]C_{9,5} \times C_{9,4} = \frac{9!}{5!4!} \times \frac{9!}{5!4!} = 15876[/tex]
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A botanist wants to determine if a fertilizer is effective
in the growth of plants. He selects the first 100 plants
of the same type of seedling from a greenhouse and
assigns the first 50 to the group that uses the fertilizer
and remaining seedlings to the group that does not
use fertilizer. He makes sure the plants all have the
same amount of water, soil, and light for two months.
At the end of two months, he measures the heights of
the plants and finds that the ones receiving the
fertilizer are significantly taller.
Which of the following is a valid conclusion?
Inferences can be made for all plants, and the
conclusion can be drawn that the fertilizer will help
all plants grow taller.
Inferences cannot be made for all plants, and the
conclusion can be drawn that the fertilizer will help
all plants grow taller.
Inferences can be made for these types of plants,
and the conclusion can be drawn that the fertilizer
will help these types of plants grow taller.
Inferences cannot be made for these types of
plants, and the conclusion cannot be drawn that the
fertilizer will help these types of plants grow taller.
Answers
Based on the information provided, the statement which is a valid conclusion is only: option A.
What is a valid conclusion?A valid conclusion can be defined as a statement that is essentially based on empirical data, formulated hypotheses, facts, and prudent experimental design, which entails that relationship between data variables are reasonable, credible and valid.
Based on the information provided, the statement which is a valid conclusion is that the botanist can make inferences for all plants, and he can draw his conclusion that the fertilizer would help all plants grow taller.
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Answer: C
Step-by-step explanation:
Inferences can be made for these types of plants, and the conclusion can be drawn that the fertilizer will help these types of plants grow taller
A ride ticket usually costs
$1.50, but if you buy 10 tickets, you get
a 5% discount. Find the sale price of 10 tickets
Answers
Answer: Hope this helps if this is what you want.
$14.25
Step-by-step explanation:
$1.50 = 1 ticket
1.50 * 10 = 15
$15 = 10 tickets
100% - 5% = 95% (0.95)
15 * 0.95 = 14.25
$14.25
((-7,1). (-3,2). (0, -2). (5, -5)}What are the domain and range of the function represented by the set of ordered pairs?
Answers
Answer:
Domain:{-7,-3,0,5}
Range:{1,2,-2,-5}
Step-by-step explanation:
i know because it works for me.
Kaminsky’s bronze sculpture is 5 feet in diameter, which is approximately 1.524 meters. If the sculpture was made of solid bronze, its weight could be approximated using the density of bronze , the volume, , in cubic meters, the mass, , in kilograms and applying the formula . Approximately, how many pounds would the sculpture weigh if it was made of solid bronze?
Answers
The weight of the spherical sculpture in pounds is approximately 251607 pounds
How to find the weight of the sculpture in pounds?
The sculpture is spherical and its made of solid bronze.
Therefore,
density = mass / volume
where
density = 7700 kg / m³
volume = 4 / 3πr³
volume = 4/ 3 × 3.14 × 1.524³
volume = 44.4574491494 / 3
volume = 14.8191497165 m³
Therefore,
mass = 7700 × 14.8191497165
mass = 114107.452817 kg
1 kg = 2.205 pounds
114107.452817 = ?
cross multiply
mass in pounds = 114107.452817 × 2.205
mass in pounds = 251606.933461
mass in pounds = 251607 pounds
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A ___ is an instrument used to draw circles and arcs.
Answers
Answer: A compass.
Step-by-step explanation: an instrument for drawing circles and arcs and measuring distances between points, consisting of two arms linked by a movable joint, one arm ending in a point and the other usually carrying a pencil or pen.
The scatter plot shows the relationship between the saturation specific humidity, in grams per kilogram of air, and the ambient temperature, in degrees celsius, of the atmosphere. which type of relationship would best model this data?
Answers
By critically observing the scatter plot (see attachment), the type of relationship that would best model this data is positive nonlinear.
The types of relationship in a scatter plot.In Statistics, there are four (4) main types of relationship (association) in a scatter plot and these include the following:
Positive linear association.Negative linear association.No association (None).Non-linear association.By critically observing the scatter plot shown in the image attached below, we can logically deduce that the type of relationship that would best model this data is positive nonlinear because the change in one of the variables doesn't result in a constant change in other variables.
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given the triangle below what is m<a, round to the nearest tenth?
Answers
The measure of angle A is 17.8
The correct option is (A)
What is angle?A figure which is formed by two rays or lines that shares a common endpoint is called an angle.
As, perpendicular from B to side AC
In triangle BDC,
its angles are 30°, 60° and 90°
So, the sides ratio be 1 :√3 : 2
Now,
BD : DC : BC = 1 :√3 : 2
= 11√3/2 : 11/2 : 11
Now, using trigonometry
Sin A = P /H
Sin A = BD/AB
=(11/2)/18
= 11/36
= 0.3055
m<A = 17.79 ≈ 17.8°
hence, the measure of A is 17.8°.
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Find the mean, median, and mode(s) of the data with and without the outlier.
45, 52, 17, 57, 42, 54, 58
Answers
Answer:
Mean = 48.5, Median = 53, Mode = nothing, Outlier = 17
Step-by-step explanation:
Mean: Add all the numbers (388) then divide by how many numbers (8) are there. (= 48.5)
Median: Is the middle number () so you have to order them from least to greatest (17, 42, 45, 52, 54, 57, 58, 63) and then just keep marking them off left, right, left, right... until you get to the middle. But since there are two numbers (52, 54) you have to add them (106) then you divide by 2 (53).
Mode: Is the number that shows up the most. In this case none of them do.
Outlier: The number that is farthest from the other numbers (17).
Median: 52
Mode: non
Business Success Restaurant owners are continually monitoring financial aspects and customer relations of their business. They use collected data to recognize trends, predict outcomes, and plan for the future. In this task, you will play the role of a restaurant owner. You will collect data and analyze different aspects of your business. As you complete the task, keep these questions in mind: Can you predict sales based on factors such as the weather and the number of customers? Can you estimate the amount you will earn in tips on a given day based on the number of customers? Directions: Complete each of the following tasks, reading the directions carefully as you go. You may use a piece of graph paper for this task. Round all decimals to the nearest hundredths place or to the nearest cent for this task. You will be graded on the work you show, or your solution process, in addition to your answers. Make sure to show all of your work and to answer each question as you complete the task. You will be given partial credit based on the work you show and the completeness and accuracy of your explanations. Your teacher will give you further directions on submitting your work. You may be asked to upload the document, e-mail it to your teacher, or hand in a hard copy. Now let’s get started! Step 1: Constructing and analyzing scatterplots You keep track of the daily hot chocolate sales and the outside temperature each day. The data you gathered is shown in the data table below. Hot Chocolate Sales and Outside Temperatures Sales ($) $100 $213 $830 $679 $209 $189 $1,110 $456 $422 $235 $199 Temperature (°F) 92° 88° 54° 62° 85° 16° 52° 65° 68° 89° 91° a) Make a scatterplot of the data above. (2 points) b) Do you notice clusters or outliers in the data? Explain your reasoning. (2 points) c)How would you describe the correlation in the data? Explain your reasoning. (2 points) d) What are the independent and dependent variables? (2 points)
Answers
Answer:
They use collected data to recognize trends, predict outcomes, and plan for the future.
Step-by-step explanation:
Which expression is equivalent to -6(-2+2x)?
O −4-12%
O −4+2%
O 4-12%
O 4+12%
Answers
Use distributive law
a(b+c)=ab+ac
-6(-2)-6(2x)12-12x12(1-x)1.5 Determine the degree of the following algebraic expressions:
a. √3xyz - 5
b. y² - 3y5-y + 2y³ - 4
c. -10³
Answers
By identifying the largest exponent in each expression, we see that the answers are:
a) D = 3.
b) D = 5.
c) D = 0.
How to determine the degree of an expression?The degree is just the largest exponent of the variable in an expression.
First, we have:
a) √3xyz - 5
The largest exponent is on the term √3*xyz is 3 (because we add the 3 exponents 1 of x, y, and z) so this expression has a degree of 3.
b) y² - 3y⁵ -y + 2y³ - 4
Here the largest exponent is on the second term, so we can see that the degree is 5.
c) -10³
Here we don't have a variable, so this is a constant, which means that the degree is zero, because we could write:
-10³*x⁰
Where we use the fact that x⁰ = 1
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What expression represents this description? Twice the quantity m plus n
Answers
Hi student, let me help you out! :)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
We are asked to find which expression represents the description "twice the quantity m plus n".
[tex]\triangle~\fbox{\bf{KEY:}}[/tex]
Translate this phrase into an algebraic expression.First, add m and n:
[tex]\star~\large\pmb{m+n}[/tex]
Now, multiply two times this sum:
[tex]\star~\large\pmb{2(m+n)}[/tex]
See, the parentheses around the sum show that we multiply two times both m and n.
Hope it helps you out! :D
Ask in comments if any queries arise.
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~Just a smiley person helping fellow students :)
Answer:
2(m + n)
Step-by-step explanation:
The words describe a quantity. "Twice" means two-times the previous amount. m and n are the unknown numbers that are being added, so you must put them in parentheses to indicate that they should be added first.
guys omg please someone answer this asap this is due tmmr
Answers
Answer:
First, break the shape into smaller shapes.
Bigger rectangle: 5m, 8m
Thin rectangle: 7m, 3m
Thinner rectangle: 8m, 2m
We will call the bigger rectangle B, the thin rectangle R, and the thinner rectangle r.
Step-by-step explanation:
B = 8 • 5 = 40
R = 7 • 3 = 21
r = 2 • 8 = 16
Add the areas together:
40 + 21 + 16 = 77
Therefore, the area is 77 meters.
Kamaria opens a bank account with $300. Five weeks later, her account balance is $500. What was the average rate of change of her account balance in dollars per week?
Answers
Answer:
$40 average
Step-by-step explanation:
500-300=200
200/5=40
URGENT PLS HELP!!!!!!!!!!!!!!!!!!!!!!!!!
Answers
The attached graph represent the points in the domain -6 < x ≤ -2
How to graph the points?The function is given as:
[tex]f(x) = \left[\begin{array}{ccc}-2&-6 < x \le -1\\1&-1 < x \le 2 & \\5 & 2 < x \le 4\end{array}\right[/tex]
The question says that we plot two points in the domain -6 < x ≤ -2
The domain -6 < x ≤ -2 means that the values of x are greater than -6, but they do not exceed -1
The function at this interval means that all values of x have an output value of -2
So, the two points to plot could be (-5,-2) and (-1,-2)
See attachment for the graph of the points
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Select the correct answer from the drop-down menu. Simplify the expression. (1-cot(r))^2/cot(r)
Answers
The simplified form of the given expression is tan(r) + cot(r) - 2
Simplifying trigonometric functionsFrom the question, we are to simplify the given trigonometric function
The given trigonometric function is
[tex]\frac{(1-cot(r))^{2} }{cot(r)}[/tex]
Expanding, we get
[tex]\frac{(1-cot(r))(1-cot(r)) }{cot(r)}[/tex]
Simplifying
[tex]\frac{1 - 2cot(r) +cot^{2}(r) }{cot(r)}[/tex]
[tex]\frac{1}{cot(r)} -\frac{2cot(r)}{cot(r)}+\frac{cot^{2}(r) }{cot(r)}[/tex]
[tex]\frac{1}{cot(r)} -2+cot(r)[/tex]
Recall: [tex]tan(x) = \frac{1}{cot(x)}[/tex]
Therefore, we get
[tex]tan(r) -2 + cot(r)[/tex]
[tex]tan(r) + cot(r)-2[/tex]
Hence, the simplified form of the given expression is tan(r) + cot(r) - 2.
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PLEASE HELP ASAP
solve for x
Answers
Answer:
29.44
Step-by-step explanation:
Since we know the both the measure of the angle and the adjacent line of the angle, we can use tan to find x.
tan is (Opposite/Adjacent Line)
[tex] \tan(31) = \frac{x}{49} \\ 49 \tan(31) = x \\ 29.44 = x[/tex]
That is the answer
- Kan Academy Advance
Select the correct answer. what is the solution set of y = x2 2x 7 and y = x 7? a. {(0, 7), (-1, 6)} b. {(0, 7), (-7, 0)} c. {(0, 7), (1, 8)} d. {(-2, 0), (4, 0)}
Answers
Answer:
a. {(0, 7), (-1, 6)}
Step-by-step explanation:
[tex]y = x^{2} +2x+7\\y=x+7[/tex]
subtract the equations
[tex]y = x^{2} +2x+7 \\- \ \ \ \ \ y=x+7\\y - y =x^{2} +2x+7-(x+7)\\0=x^{2} +x\\x = 0 \ and \ x= -1[/tex]
for [tex]y = x^{2} +2x+7[/tex], substitute x = 0
[tex]y = (0)^{2} +2(0)+7\\y = 0 +0+7\\y=7[/tex]
for [tex]y = x^{2} +2x+7[/tex], substitute x = 0
[tex]y = (-1)^{2} +2(-1)+7\\y = 1 -2+7\\y=6[/tex]
Answer:
A
Step-by-step explanation:
In the figure, line p || line q. Find the measure of each angle if m<8 = 115
Answers
Answer:
65, 65, 115
Step-by-step explanation:
Attached image
x^2 - 3x - 28 factor compleatly
Answers
Answer:
Step-by-step explanation:
x² - 3x - 28
What factors multiply to -28 and add to -3?
-7 and 4.
(x - 7) (x + 4)
Answer:
(x - 7)(x + 4)
Step-by-step explanation:
To find the factors, you just need to ask yourself the question: Which two numbers multiply to -28 but add to -3?
Simple guess-and-check will lead you to the numbers -7 and 4.
-7 x 4 = -28
-7 + 4 = -3
These numbers will make up the factored equation.
x² - 3x - 28
(x - 7)(x + 4)
You can check your answer by re-expanding the factored expression. This is done by multiplying each term in the first parentheses by each term in the second parentheses.
(x - 7)(x + 4) ----> x² - 7x + 4x - 28 ----> x² - 3x - 28
Miguel and Lauren are testing two versions of a new video game. in Miguel's version he receives 25 points at the start of the game, plus one point for each level he completes. In Laurens version she receives 20 points at the start of the game, and 2 points for each level she completes. at what level will they have the same amount of points ?
Answers
Answer: 5 levels
Step-by-step explanation:
We will set up a system of equations and solve. Let x be the number of levels beaten, and let y be the number of total points.
Miguel's version:
y = 1x + 25
Lauren's version:
y = 2x + 20
Now, we will graph both equations. The x-coordinate of the point-of-intersection is the answer to our question.
See attached.
The lines intersect at (5, 30) meaning they will have the same number of points after 5 levels, with 30 points.
round to 1 significant figure and estimate 423 x 764
Answers
Answer:
300,000
Step-by-step explanation:
423 x 764 = 323,172
Given that x= 7.4m and θ= 32°, work out BC rounded to 3 SF.
(not drawn accurately.)
Answers
Answer:
BC ≈ 11.8 m
Step-by-step explanation:
using the tangent ratio in the right triangle
tanΘ = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{AB}{BC}[/tex] , that is
tan32° = [tex]\frac{x}{BC}[/tex] = [tex]\frac{7.4}{BC}[/tex] ( multiply both sides by BC )
BC × tan32° = 7.4 ( divide both sides by tan32° )
BC = [tex]\frac{7.4}{tan32}[/tex] ≈ 11.8 m ( to 3 sf )
Is 3²+3³ equal to 3⁵?
( yes, no ) the expressions (are, are not ) equal
Answers
Answer: No the expressions are not equal
Work Shown:
3² = 3*3 = 9
3³ = 3*3*3 = 27
3²+3³ = 9+27 = 36
3⁵ = 3*3*3*3*3 = 243
The 3²+3³ = 36 doesn't match up with 3⁵ = 243
Therefore, the two expressions are not equal.
Answer:
Step-by-step explanation:
No, the expressions are not equal.
3^2 + 3^3 = 9 + 27 = 36
3^2 * 3^3 = 3^5
keep the base the same and add the exponents
Gerrie collects honey from a few
beehives. She scoops out the honey
with a small jar that holds of a cup.
Over the last two weeks Gerrie has
filled this jar 158 times. How many
cups of honey has she collected?
Answers
The number of the cups of honey has she collected will be 52 and 2/3 cups.
What are ratio and proportion?A ratio is a collection of ordered integers a and b represented as a/b, with b never equaling zero. A proportionate expression is one in which two items are equal.
Gerrie collects honey from a few beehives.
She scoops out the honey with a small jar that holds 1/3 of a cup.
Over the last two weeks, Gerrie has filled this jar 158 times.
1 small jar = 1/3 cup
But we have done this for 158 times. Then we have
158 small jar = 158 x 1/3 cups
158 small jar = 52 and 2/3 cups
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What is the difference between the highest and lowest points in a data set?the mean the median the mode the range
Answers
Answer:
Range
Step-by-step explanation:
Range is found by subtracting the highest and lowest point in the dataset
Mode is the number that occurs most frequently in the set
Median is the central number in the dataset when arranged from lowest to highest
Mean is the sum of all the numbers in the dataset divided by how many numbers there are.
For example, take this list of numbers: 10, 10, 20, 40, 70.
The mean (also known as average) is found by: 10 + 10 + 20 + 40 + 70 / 5 = 30.
The median is found by ordering the set from lowest to highest and finding the exact middle. The median is just the middle number: 20.
Ann bought 2 pounds of cheese to make lasagna. the recipe gives the amount of cheese needed in ounces. how many did she buy?
Answers
Answer:
Ann bought 32 ounces of cheese.
Step-by-step explanation:
First of all, that is a lot of cheese, I hope she is not lactose intolerant.
Second of all, one pound is equivalent to 16 ounces. Given this, we can multiply the pounds of cheese by 16.
That would look like 2×16=32.
I hope this answer helped you and also made you laugh. It is correct though, despite the comedy.
What is the difference of the fractions? Use the number line to help find the answer.
StartFraction 1 over 5 EndFraction minus three-fourths
A number line going from negative 1 to positive 1 in increments of StartFraction 2 over 20 EndFraction.
Negative StartFraction 19 over 20 EndFraction
Negative StartFraction 11 over 20 EndFraction
StartFraction 11 over 20 EndFraction
StartFraction 19 over 20 EndFraction
Answers
The result of the expressionn 1/5 - 3/4 will be negative 11/20. Then the correct option is C.
What is a fraction number?A fraction number is a number that represents the part of the whole, where the whole can be any number. It is in the form of numerator and denominator.
The expression is given below.
⇒ 1/5 - 3/4
⇒ (4 - 15) / 20
⇒ -11 / 20
Then the correct option is C.
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Answer:
c
Step-by-step explanation:
Ten cars were recently assembled at a factory. Of these
cars, 3 will be picked at random for inspection. Of the
10 cars, 5 are blue and 5 are grey. What is the
probability that all 3 cars picked for inspection will be
blue?
Answers
Answer:
1/12
Step-by-step explanation: