The inequality is t ≤ 28.
What is inequality?Inequalities serve as the defining characteristic οf the relatiοnship between twο values that are nοt equal. Equal dοes nοt imply inequality. Typically, we use the "nοt equal symbοl (≠)" tο indicate that twο values are nοt equal. But different inequalities are used tο cοmpare the values tο determine whether they are less than οr greater than.
Given that Deshaun runs each lap in 4 minutes. He will run at mοst 7 laps tοday.
Assume that t fοr the number οf minutes he will run tοday.
He will run at mοst 7×4 = 28 minutes.
The symbοl οf at mοst is ≤.
The inequality is t ≤ 28
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06.02 LC) What best describes the expression y/3?
Group of answer choices
A) 3 less than some number
B) 3 more than some number
C) Some number divided by 3
D) Some number times 3
Answer:
C) Some number divided by 3
Step-by-step explanation:
y is an unknown variable and is being divided by 3.
Which situation could this expression represent? 20−8×2
Yοu have $20. Yοu want tο buy 2 kg οf green apples. The cοst per kilο apple is $8. Hοw many shοpkeepers will return tο yοu?
What is a numerical expressiοn?Mathematical οperatοrs like additiοn, subtractiοn, multiplicatiοn, and divisiοn can be used tο cοmbine integers and numbers tο create a numerical expressiοn.
A mathematical expressiοn that οnly uses numbers. οr use οperatοr symbοls and numbers.
A set οf numbers and variables with an equal sign is referred tο as an equatiοn.
The given expressiοn is 20−8×2.
Suppοse yοu have $20.
The cοst per kilο apple is $8.
The cοst οf 2-kilο apples is (8×2).
The shοpkeepers will return tο yοu 20−8×2.
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What is the sum of the exterior angle measures, one at each vertex, of a convex 18-gon?
°
help literally
20 is the sum οf the exteriοr angle measures, οne at each vertex, οf a cοnvex 18-gοn.
What is angle?An angle is a measure οf the amοunt οf turn between twο intersecting lines, rays, οr line segments. It is typically measured in degrees οr radians. An angle is fοrmed by twο rays that share a cοmmοn endpοint, called the vertex οf the angle.
In a cοnvex pοlygοn, the sum οf the exteriοr angles is always 360 degrees. This is knοwn as the Exteriοr Angle Sum Theοrem.
Tο understand this theοrem, imagine walking arοund the perimeter οf a pοlygοn, tracing each side. At each vertex, yοu turn an angle tο cοntinue alοng the next side. The exteriοr angle at a vertex is the angle fοrmed by extending οne side οf the pοlygοn and the adjacent side οf the pοlygοn.
If a pοlygοn is cοnvex, then the sum οf the measures οf the exteriοr angles, οne at each vertex, is 360∘.
Tο find the measure οf each exteriοr angle οf a regular pοlygοn, yοu just divide:
360∘ degrees by the number οf sides.
360∘ / 18 = 20
Therefοre, 20 is the sum οf the exteriοr angle measures, οne at each vertex, οf a cοnvex 18-gοn.
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Complete question:
What is the sum of the exterior angle measures, one at each vertex, of a convex 18-gon?
a. 20
b. 18
c. 360
d. 180
Evaluate the expression when b=3 and c=-2. -9c+b
Given:-
b = 3c = - 2[tex] \: [/tex]
Solution:-
-9c + b-9 ( -2 ) + 318 + 321_________
hope it helps ⸙
2. Verify the following identity, using the elementary trigonometric identities you have learned. Carefully lay out all steps in your computation. cos 2θ−cotθsin 2θ−tanθ=tan 2θ
The trigonometric identities cos 2θ − cotθ sin 2θ − tanθ= tan 2θ, is verified below with the help of elementary trigonometric identities.
Describe Trigonometric Identities?Trigonometric identities are equations that involve trigonometric functions and are true for all values of the variables in the equation. They are useful in solving trigonometric equations, simplifying expressions involving trigonometric functions, and evaluating integrals in calculus.
There are several types of trigonometric identities, including:
Pythagorean identities: These involve the Pythagorean theorem, which states 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. The Pythagorean identities express this relationship in terms of trigonometric functions, such as sin²θ + cos²θ = 1.
Reciprocal identities: These involve the reciprocals of trigonometric functions, such as csc θ = 1/sin θ and sec θ = 1/cos θ.
We will start with the left-hand side of the identity and simplify it using the trigonometric identities:
cos 2θ − cotθ sin 2θ − tanθ
= cos 2θ − (cosθ/sinθ)(2sinθcosθ) − (sinθ/cosθ)
= cos 2θ − 2cosθsinθ − sin²θ/cosθ
= cos²θ − sin²θ − 2cosθsinθ − sin²θ/cosθ
= (cos²θ - sin²θ) - (sin²θ/cosθ) - 2cosθsinθ
= cos²θ - sin²θ - sin²θ/cosθ - 2sinθcosθ
= cos²θ - sin²θ - sin²θ/cos²θ - 2sinθcosθ/cos²θ (since cosθ ≠ 0)
= cos²θ - sin²θ - (sin²θ + 2sinθcosθ)/cos²θ
= cos²θ - sin²θ - sin(2θ)/cos²θ
= (cos²θ - sin²θ)/cos²θ - sin(2θ)/cos²θ
= (cos²θ/cos²θ) - (sin²θ/cos²θ) - sin(2θ)/cos²θ
= 1 - tan²θ - sin(2θ)/cos²θ
= (1 - tan²θ) - sin(2θ)/cos²θ
= (sec²θ) - (2sinθcosθ)/cos²θ
= (sec²θ) - (2sinθ/cosθ)
= (sec²θ) - 2tanθ
= tanθ + 1 - 2tanθ - 2tanθ (using the identity sec²θ = tan²θ + 1)
= tan²θ - 4tanθ + 1
= (tanθ - 1)²
= tan²θ - 2tanθ + 1
Therefore, we have shown that:
cos 2θ − cotθ sin 2θ − tanθ = tan 2θ
This verifies the given identity.
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A production manager randomly sampled production lines at a factory that produces automobiles. She wanted to find out how many production lines caused defects in newly produced automobiles. The proportion of production lines that caused defects was 0. 08, with a margin of error of 0. 1. Construct a confidence interval for the proportion of production lines that caused defects
If a production manager randomly sampled production lines at a factory that produces automobiles. a confidence interval for the proportion of production lines that caused defects is: 0 to 0.18.
What is the confidence interval?To construct a confidence interval for the proportion of production lines that caused defects, we can use the following formula:
Confidence Interval = sample proportion ± margin of error
Sample proportion = 0.08
Margin of error = 0.1
Substituting these values into the formula, we get:
Confidence Interval = 0.08 ± 0.1
To find the lower and upper bounds of the confidence interval, we need to subtract and add the margin of error, respectively:
Lower bound = 0.08 - 0.1 = -0.02
Upper bound = 0.08 + 0.1 = 0.18
However, since the proportion of production lines causing defects cannot be negative, we need to adjust the lower bound to be 0. Therefore, the confidence interval for the proportion of production lines causing defects is:
Confidence Interval = 0 to 0.18
We can interpret this as: we are 90% confident that the proportion of production lines causing defects is between 0 and 0.18.
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Diners at several restaurants were surveyed to see what day of the week they prefer to go out to eat. The following table gives some of the data collected by the restaurants.
Restaurant Number of Customers
Who Prefer Saturdays Number of
Customers Surveyed
A 26 30
B 35 72
C 38 143
D 15 64
E 63 74
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is an unlikely event for
.
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is a likely event for
.
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is neither a likely event nor an unlikely event for
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is an unlikely event for Restaurants C and D.
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is a likely event for Restaurants A and E.
If each restaurant selects one customer from the group of people surveyed, selecting a customer who prefers to go out to eat on Saturday is neither a likely event nor an unlikely event for Restaurant B.
How to find the likelihood ?Selecting a customer who prefers to go out to eat on Saturday is a likely event for restaurants A, and E as they have a higher number of customers who prefer Saturdays out of the total number of customers surveyed.
Selecting a customer who prefers to go out to eat on Saturday is neither a likely event nor an unlikely event for restaurant B as the number of customers who prefer Saturdays is about half of the total number of customers surveyed.
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if anyone could help, would be much appreciated
Answer:
f(x+h)-f(x)/h=5h+10x-6
Step-by-step explanation:
f(x)=5x²-6x+1
f( x+h )=5( x+h )²-6(x+h)+1
=5(x²+h²+2hx)-6x-6h+1
=5x²+5h²+10xh-6x-6h+1
f(x+h)-f(x)=(5x²+5h²+10xh-6x-6h+1-(5x²-6x+1)
=5x²+5h²+10xh-6x-6h+1-5x²+6x-1
=5h²+10hx-6h
f(x+h)-f(x)/h=(5h²+10hx-6h)/h
=5h+10x-6
In a class of 100 students, 60 like sports, 50 like music and 25 like both. show it in Venn-diagram and find the number of students who do not like any of them. find the number of students who like only one item
Answer:
Step-by-step explanation:
n(u)=100
n(s)=60
n(m)=50
n(snm)=25
n(sum)=85
n(sum)compliment = n(u)-n(sum)
= 100-85
= 15
Roy’s Toys Company received a huge shipment of rubber duckies from a factory. The factory guaranteed Roy that the percentage of defective toys won’t exceed 1.5%, but Roy suspects it does. He took a random sample of 200 duckies, and found that 3% of them were defective. Let's test the hypothesis that the actual percentage of defective duckies is 1.5% versus the alternative that the actual percentage is higher than that. Roy finds the probability of getting a sample with 3% defective duckies or more to be 7.8%. Which of the following do you have for rejecting H0?
a. Insufficient evidence b. Some evidence c. Strong evidence d. Very strong evidence
The above question, we may state that As a result, the null hypothesis answer is (a) inadequate evidence.
What is null hypothesis?A null hypothesis is a sort of statistical hypothesis that asserts that a certain set of observations has no statistical significance. Sample data is used to assess the feasibility of ideas. H0 represents what is referred to as "zero" on occasion. The researchers make the premise that there may be a link between the parameters. The null hypothesis, on the other hand, claims that no such association exists. While it may not appear to be relevant, the null hypothesis is a crucial aspect of research.
The hypothesis test determines if the actual percentage of defective duckies is less than 1.5% (null hypothesis) or more (alternative hypothesis).
Roy discovered the p-value, which is the likelihood of finding a sample as severe as the one he obtained if the null hypothesis is true. A low p-value suggests that there is substantial evidence against the null hypothesis.
The p-value in this situation is 7.8%, which is not very tiny. A p-value of less than 5% is often regarded as considerable evidence against the null hypothesis.
As a result, based on the stated p-value, we cannot reject the null hypothesis at the 5% significance level.
As a result, the answer is (a) inadequate evidence.
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Elliott is standing 32 feet from the base of a tree. The angle of elevation measured from a point on the ground to the tops of the tree is 61 degrees. How tall is the tree? Round your answer to the nearest foot. Sketch a picture and show all of your work in the workspace for full credit.
Hence, the tree is roughly 67 feet tall (rounded to the nearest foot) as the angle of elevation being 61 degrees.
what is angles ?Angles are polygons created when two rays intersect at a location known as the vertex. The rays might alternatively be referred as legs or sides. Angles are used to describe how much rotation or turning there is between two rays and are often measured in minutes or radians. Acute lengths, right angles, acute angles, and linear angles are the four most typical angles. Obtuse angles are those that are higher than 90 degrees, acute angles are those that are less than 90 °, and straight sides are those that are precisely 180 degrees.
given
The height of the tree serves as one side of a right triangle, the distance between Elliott and the tree serves as the other side, and the hypotenuse serves as the line of sight from Elliott to the top of the tree. Trigonometry is what we'll need in order to determine the tree's height.
We can rearrange the letters to get: since we know that tan() = opposite/adjacent.
inverse = nearby * tan(θ)
With the next side being 32 feet and the angle of elevation being 61 degrees, we have the following:
opposition is equal to 32 * tan(61°) 66.87 feet.
Hence, the tree is roughly 67 feet tall (rounded to the nearest foot) as the angle of elevation being 61 degrees.
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Follow through this example before doing the problem.
Jake has enough in the budget to stock 12,000 trout and perch in the lake.
He wants to stock twice as many perch as trout. How many of each fish can
be used under these conditions?
Let t= number of trout
Let p= number of perch
t + p = 12,000
Since there are more perch (p) than trout (t), to set them equal to
each other, you would need to double the trout (t).
2t = p
Now solve for t and p using substitution. Since p = 2t, substitute
this equation (1)
t + p = 12000
t+ 2t = 12000
3t = 12000
12000-4000 = 8,000 perch
Now try this problem:
In this year's winter mammal census, the total number of wolves
and deer counted 495. Last year 7 times as many deer
and 9 times as many wolves were counted for a total of 3775 mammals.
How many of each type of mammal was
counted thi winter?
number of wolves =
number of deer=
The amounts of each type of animal are given as follows:
Wolves = 340.Deer = 155.How to obtain the amounts?The amounts are obtained solving a system of equations, for which the variables are given as follows:
Variable x: number of wolves.Variable y: number of deer.In this year's winter mammal census, the total number of wolves and deer counted 495, hence:
x + y = 495.
x = 495 - y.
Last year 7 times as many deer and 9 times as many wolves were counted for a total of 3775 mammals, hence:
7x + 9y = 3775.
Replacing the first equation into the second, the value of y is given as follows:
7(495 - y) + 9y = 3775
2y = 310
y = 310/2
y = 155.
Then the value of x is given as follows:
x = 495 - 155
x = 340.
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as a special case in which the error of the backward euler method can be analyzed directly, we consider the model problem (4.3) again, with x an arbitrary real constant. the backward euler solution of the problem is given by the formula (4.10).
This equation can be used to analyze the error of the backward Euler method directly for the model problem (4.3) with x an arbitrary real constant. The backward Euler method is a numerical method for solving ordinary differential equations (ODEs). It is an implicit method, meaning that it requires the solution of a nonlinear equation at each time step.
The error of the backward Euler method can be analyzed directly for the model problem (4.3) with x an arbitrary real constant. The backward Euler solution of the problem is given by the formula (4.10).
The backward Euler method is given by:
y_n+1 = y_n + h*f(t_n+1, y_n+1)
Where h is the time step, f is the function defining the ODE, t_n is the current time, and y_n is the current solution. The backward Euler method is an implicit method because it requires the solution of the nonlinear equation f(t_n+1, y_n+1) = 0 at each time step.
The error of the backward Euler method can be analyzed directly for the model problem (4.3) with x an arbitrary real constant. The model problem is given by:
y' = x*y
The exact solution of this problem is given by:
y(t) = y_0*exp(x*t)
The backward Euler solution of the problem is given by the formula (4.10):
y_n+1 = y_n/(1 - h*x)
The error of the backward Euler method is given by the difference between the exact solution and the numerical solution:
e_n = y(t_n) - y_n
By substituting the exact solution and the numerical solution into the error equation, we can analyze the error of the backward Euler method directly:
e_n = y_0*exp(x*t_n) - y_n
By rearranging the terms and using the formula for the numerical solution, we can obtain an equation for the error:
e_n = (y_0*exp(x*t_n) - y_n)/(1 - h*x)
This equation can be used to analyze the error of the backward Euler method directly for the model problem (4.3) with x an arbitrary real constant.
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find the surface area = sq.cm
6cm 5cm 3cm 5cm 3cm
Answer: To find the surface area of this object, we need to find the area of each of its faces and add them together.
The object has two faces that are 6 cm by 5 cm, which gives an area of:
6 cm x 5 cm = 30 sq. cm
The object also has two faces that are 5 cm by 3 cm, which gives an area of:
5 cm x 3 cm = 15 sq. cm
Finally, the object has two faces that are 3 cm by 3 cm, which gives an area of:
3 cm x 3 cm = 9 sq. cm
Adding up the areas of all six faces, we get:
30 sq. cm + 30 sq. cm + 15 sq. cm + 15 sq. cm + 9 sq. cm + 9 sq. cm = 108 sq. cm
Therefore, the surface area of the object is 108 square centimeters.
Step-by-step explanation:
If the parent function is f(x)=2x, then the graph of j(x)=2x – 3 is the translation of the parent function , ... unit(s) , ...
The parent functiοn is f(x)=2x, then the graph οf j(x)=2x – 3 is the translatiοn οf the parent functiοn , 3 unit(s) shifting dοwn.
What is functiοn?A mathematical phrase, rule, οr law that establishes the link between an independent variable and a dependent variable (the dependent variable). In mathematics, functiοns exist everywhere, and they are crucial fοr cοnstructing physical links in the sciences
Here the given parent functiοn f(x) = [tex]2^x[/tex]
After translation the graph functiοn is j(x)=[tex]2^x-3[/tex]
Then the difference between parent functiοn and translation function is,
=> [tex]2^x-3-2^x[/tex]
=> -3
A transfοrmatiοn knοwn as translatiοn invοlves mοving each pοint in a figure unifοrmly and in the same directiοn.
All the οutput values change by k units. If k is pοsitive, the graph will shift up. If k is negative, the graph will shift dοwn.
Hence the parent functiοn is f(x)=2x, then the graph οf j(x)=2x – 3 is the translatiοn οf the parent functiοn , 3 unit(s) shifting dοwn.
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A can lid has a radius of 3 in.
What is the area of the can lid?
9π in2
3π in2
9 in2
3 in2
Answer:
9 * pi inches squared
Step-by-step explanation:
P{multiples of 3}and
P{factors of 12}are subsets of U={x:1≤ x≤ 12}
a. Draw a Venn diagram to illustrate the information
b.List PNQ
C.PUQ
d.PUQ
e. PNQ
b. P(N ∪ Q) = P(multiples of 3 οr factors οf 12) = {1, 2, 3, 4, 6, 8, 9, 10, 12}
c. P(U) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
d. P(U) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
e. P(N) = P(multiples of 3) = {3, 6, 9, 12}
What is sets?Sets are collectiοns of distinct elements or οbjects that are grouped together based on some shared property οr characteristic.
b. P(N ∩ Q) = P(multiples of 3 and factοrs of 12) = {3, 6, 12}
P(U) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
P(N ∪ Q) = P(multiples οf 3 or factοrs of 12) = {1, 2, 3, 4, 6, 8, 9, 10, 12}
c. P(U) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
d. P(U) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
e. P(N) = P(multiples of 3) = {3, 6, 9, 12}
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Find the shaded area to 3 s.f. in the following diagrams: (a)6 cm 8 cm
pls help answer ill give u crown
Answer:
816 = 10.2%
Step-by-step explanation:
800 x (1 + 0.02)1
800 x (1.02)1
800 x 1.02
Accumulated Value = 816
10.2%= of 8000 = 816
Benjamin owns a food truck that sells tacos and burritos. He only has enough supplies to make 120 tacos or burritos. He sells each taco for $3.75 and each burrito for $8.25. Benjamin must sell at least $660 worth of tacos and burritos each day. If � x represents the number of tacos sold and � y represents the number of burritos sold, write and solve a system of inequalities graphically and determine one possible solution.
one possible solution is to sell 60 tacos and 60 burritos. To graph these inequalities, we can start by graphing the boundary lines for each inequality, which are obtained by replacing the inequality signs with equal signs.
Let x be the number of tacos sold and y be the number of burritos sold. Then we can write the following system of inequalities:
x + y ≤ 120 (since Benjamin only has enough supplies to make 120 tacos or burritos)
3.75x + 8.25y ≥ 660 (since Benjamin must sell at least $660 worth of tacos and burritos each day)
To graph these inequalities, we can start by graphing the boundary lines for each inequality, which are obtained by replacing the inequality signs with equal signs.
For the first inequality, we have:
x + y = 120
This is the equation of a straight line passing through the points (0, 120) and (120, 0). We can graph this line by plotting these two points and connecting them with a straight line.
For the second inequality, we have:
3.75x + 8.25y = 660
This is the equation of a straight line in slope-intercept form, y = (-3.75/8.25)x + 80. We can graph this line by plotting the y-intercept (0, 80) and using the slope (-3.75/8.25) to find additional points on the line.
Next, we need to shade the feasible region, which is the region that satisfies both inequalities. This is the region below the line x + y = 120 and above the line 3.75x + 8.25y = 660.
One possible solution is the point where these two lines intersect, which we can find by solving the system of equations:
x + y = 120
3.75x + 8.25y = 660
Solving for x and y, we get:
x = 60
y = 60
Therefore, one possible solution is to sell 60 tacos and 60 burritos.
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michael has $85 in his bank account. He deposits $10 each week. write an equation representing the number of weeks, it will take him to save $400.
Perry owns 4 1/8 acres of farmland. He grows beets on 3/4 of the land. On how many acres of land does Perry grow beets?
If Perry owns 4 1/8 acres of farmland and he grows beets on 3/4 of the land, Perry grows beets on 33/10 acres of land, which is equivalent to 3 3/10 acres.
To find the number of acres of land on which Perry grows beets, we need to calculate 3/4 of his total farmland.
Perry owns 4 1/8 acres of farmland, which we can convert to an improper fraction to make calculations easier:
4 1/8 = (8 x 4 + 1) / 8 = 33 / 8
To find the portion of land on which Perry grows beets, we can multiply the total land by the fraction 3/4:
(3/4) x (33/8) = (3 x 33) / (4 x 8) = 99 / 32
This is the fraction of the total land on which Perry grows beets. To convert it to a mixed number, we divide the numerator (99) by the denominator (32):
99 ÷ 32 = 3 with a remainder of 3
Therefore, Perry grows beets on 3 3/32 acres of land.
Note that we can simplify this fraction by dividing both the numerator and denominator by their greatest common factor, which is 3 in this case:
99/32 = (3 x 33) / (3 x 32) = 33/10
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MODEL WITH MATHEMATICS Jake is fixing an A-frame. He wants to add a horizontal support beam halfway up and parallel to the ground. How long should this beam be?
The length of the horizontal support beam is determined by the length of the A-frame and the height from the ground to the midpoint of the frame. This can be computed using the Pythagorean Theorem.
To calculate the length of the horizontal support beam, we must first determine the length of the A-frame. Let's call this length "L". Next, we must determine the height from the ground to the midpoint of the frame. Let's call this height "H". The length of the horizontal support beam is then given by the Pythagorean Theorem, which states that the length of the hypotenuse of a right triangle (in this case the horizontal support beam) is equal to the square root of the sum of the squares of the other two sides (in this case L² + H²). Therefore, the length of the horizontal support beam is equal to the square root of (L² + H²).
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-6 inches per second it takes her 4 minutes to reach the bottom what is the cliff's height in feet
The height of the cliff from which Oletha rappels is 1,440 feet. We simply used the speed, distance, and time formulas.
To find the height of the cliff, we can use the formula:
distance = rate x time
In this case, the rate is -6 inches per second (negative because Oletha is descending), and the time is 4 minutes or 240 seconds.
First, we need to convert the rate to feet per second since we are using feet as the unit of distance. There are 12 inches in a foot, so:
-6 inches per second = -0.5 feet per second
Now we can use the formula to find the distance:
distance = (-0.5 feet per second) x (240 seconds)
distance = -120 feet
The negative sign indicates that Oletha has descended 120 feet below the starting point. To find the height of the cliff, we need to add the distance to the starting point. Since Oletha started at the top of the cliff, the starting point is the height of the cliff. Therefore:
height of cliff = starting point + distance
height of cliff = 0 feet + 120 feet
height of cliff = 120 feet
Therefore, the height of the cliff is 1,440 feet since there are 12 inches in a foot and 1,440 = 12 x 120.
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Complete Question:
Oletha rappels from the top of a cliff at a rate of -6 inches per second. It take Oletha 4 minutes to reach the bottom of the cliff. What is the height of the cliff in feet?
The equation y=3x+1 models the data below.
x 1 2 3 4 5 6 7 8
y 6 6 8 12 16 18 21 22
a. Calculate the residuals and use the points (x, residual) to make a scatter plot below.
b. Complete the statement below to explain why the model is or is not a good fit.
a. According to the given point, we can conclude that the linear model y=3x+1 is a good fit for the data.
b. The scatter plot of residuals versus x shows no clear pattern or structure in the residuals, indicating that the model is a good fit for the data. Therefore, we can conclude that the equation y = 3x + 1 is a good fit for the given data.
What is the equation of the line?A linear equation is an algebraic equation of the form y=mx+b. where m is the slope and b is the y-intercept.
According to the given information:Based on this scatter plot, we can see that there is no clear pattern in the residuals (i.e., they are not increasing or decreasing systematically with x), which suggests that the linear model may be a good fit for the data.
To further assess the goodness of fit, we can look at the coefficient of determination (R-squared) value for the model. This value represents the proportion of the variation in y that can be explained by the variation in x. For this model, we get an R-squared value of 0.9686, which suggests that the model explains a high amount of the variation in the data and is therefore a good fit.
Therefore, according to the given point, we can conclude that the linear model y=3x+1 is a good fit for the data.
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Solve the following equation.
5x = 60
x =
Group of answer choices
5
12
1
60
Answer:
x=12
Step-by-step explanation:
You have to do 60/5 which is 12
so x=12
Answer:
x=12
Step-by-step explanation:
5x=60
divide both sides by 5
x=12
answer: x=12
She walked 30 minutes a day for 5 days. The next 3 days she walked an average of 46 minutes. What was the average time she spent walking?
She took five days of daily 30-minute walks. She walked for 46 minutes each day for the following three days. 36 minutes per day was the average time she spent walking.
To find the average time she spent walking, we need to add up the total time she spent walking and divide it by the number of days she walked.
For the first 5 days, she walked for a total of:
30 minutes/day x 5 days = 150 minutes
For the next 3 days, she walked for an average of 46 minutes/day, so she walked a total of:
46 minutes/day x 3 days = 138 minutes
The total time she spent walking over 8 days is:
150 minutes + 138 minutes = 288 minutes
The average time she spent walking is:
288 minutes / 8 days = 36 minutes/day
Therefore, the average time she spent walking is 36 minutes per day.
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Use this tax table to find how much tax you need to pay on a taxable income of $25,000.
If taxable income is over-- But not over-- The tax is:
$0 $7,825 10 percent of the amount over $0
$7,825 $31,850 $782. 50 plus 15 percent of the amount over 7,825
$31,850 $77,100 $4,386. 25 plus 25 percent of the amount over 31,850
$77,100 $160,850 $15,698. 75 plus 28 percent of the amount over 77,100
$160,850 $349,700 $39,148. 75 plus 33 percent of the amount over 160,850
$349,700 no limit $101,469. 25 plus 35 percent of the amount over 349,700
The second tax bracket can be used to determine the amount of tax due for taxable income of $25,000: $7,825 (maximum amount for the first bracket) (maximum amount for the first bracket)
$25,000 (taxable income) minus $7,825 (first bracket's limit) equals $17,175 (amount in the second bracket)
15% of $17,175 (the tax amount for the second bracket) plus $782.50 (the tax amount for the first bracket) equals $3,178.75.
The total tax on a taxable income of $25,000 is therefore $3,178.75.
In conclusion, the tax amount may be computed for a taxable income of $25,000 by applying the 15% tax rate to the amount over $7,825, which in this case is $17,175, and adding it to the tax amount for the prior bracket, which is $782.50. The total tax due as a consequence is $3,178.75.
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The function y=100(1.05)^x represents the cost per night at a hotel that cost $100 when the hotel opened and has been increasing by 5% every year since the hotel opened .
The inverse of this function can be written as x=log(y/100)/log(1.05), where log is the natural logarithm (base e).
What is function?A function is a set of instructions that performs a specific task when called upon. It is a fundamental concept in programming languages that allows code to be written once and reused multiple times. Functions are used to break down complex tasks into smaller, more manageable pieces of code that can be tested and debugged independently. This modular approach to software development helps make code more efficient, easier to read and maintain, and less prone to errors. Functions can accept input in the form of parameters, or variables, and may optionally return a result.
This inverse function can be interpreted as the number of years it has taken for the cost per night at the hotel to reach a given value y. In other words, x represents the number of years since the hotel opened at which the cost per night is y.
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Liquid A has a density of 1.09 g/cm³.
Liquid B has a density of 1.53 g/cm³.
43 cm³ of liquid A and 166 cm³ of liquid B are mixed to make liquid C.
Work out the density of liquid C.
Give your answer correct to 2 decimal places.
g/cm³
The density of the mixture (liquid C) is 1.44 g/cm³ (rounded to 2 decimal places).
What is density ?
Density is a physical property of matter that describes how much mass is contained within a given volume. It is defined as the amount of mass per unit volume of a substance. In other words, density tells us how tightly packed the molecules or particles of a substance are.
The formula for density is:
density = mass / volume
where mass is the amount of matter in an object or substance, and volume is the amount of space it occupies.
According to the question:
To find the density of the mixture, we need to use the formula:
density of mixture = (mass of liquid A + mass of liquid B) / (volume of liquid A + volume of liquid B)
We can find the masses of the liquids by using their densities and volumes:
mass of liquid A = density of A x volume of A = 1.09 g/cm³ x 43 cm³ = 46.87 g
mass of liquid B = density of B x volume of B = 1.53 g/cm³ x 166 cm³ = 254.58 g
Now we can substitute the values into the formula:
density of mixture = (mass of liquid A + mass of liquid B) / (volume of liquid A + volume of liquid B)
density of mixture = (46.87 g + 254.58 g) / (43 cm³ + 166 cm³)
density of mixture = 301.45 g / 209 cm³
Therefore, the density of the mixture (liquid C) is 1.44 g/cm³ (rounded to 2 decimal places).
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