To find the equation of the tangent plane to the surface at the given point (6, 8, ln(10)), we need to use the gradient vector.
The gradient vector of the surface h(x, y) = ln√(x^2 + y^2) is given by:
∇h = (∂h/∂x, ∂h/∂y)
To find the partial derivatives, we differentiate h(x, y) with respect to x and y:
∂h/∂x = (∂/∂x)(ln√(x^2 + y^2)) = (1/√(x^2 + y^2)) * (∂/∂x)(√(x^2 + y^2))
= (1/√(x^2 + y^2)) * (x/(√(x^2 + y^2)))
∂h/∂y = (∂/∂y)(ln√(x^2 + y^2)) = (1/√(x^2 + y^2)) * (∂/∂y)(√(x^2 + y^2))
= (1/√(x^2 + y^2)) * (y/(√(x^2 + y^2)))
Evaluating these partial derivatives at the given point (6, 8, ln(10)), we have:
∂h/∂x = (6/(√(6^2 + 8^2))) = 3/5
∂h/∂y = (8/(√(6^2 + 8^2))) = 4/5
Now, we can use these values along with the point (6, 8, ln(10)) to write the equation of the tangent plane using the point-normal form:
(x - 6)(∂h/∂x) + (y - 8)(∂h/∂y) + (z - ln(10)) = 0
Substituting the values, the equation of the tangent plane is:
(x - 6)(3/5) + (y - 8)(4/5) + (z - ln(10)) = 0
Simplifying the equation will give the final form of the tangent plane equation.
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The profit that a company makes selling an item (in thousands of dollars) depends on the price of the item (in dollars). If p is the price of the item, then three equivalent forms for the profit are
Standard form: - 2 p^2 + 24p - 54
Factored form: -2(p - 3)(y-9)
Vertex form: -2(p-6)^2 + 18.
Which form is most useful for finding a. The prices that give a profit of zero dollars?
b. The profit when the price is zero?
c. The price that gives the maximum profit?
Answer:
Step-by-step explanation:
If the profit of a company made by the company is in the form a quadratic expressions but in the different forms as given in the question.
a). The prices that give a profit of zero dollars.
Expression that is most useful,
Factored form: -2(p - 3)(p - 9) = 0
p = 3, 9
b). The profit when the price is zero .
Standard form:
Profit = -2p² + 24p - 54 = 0
-p² + 12p - 27 = 0
-p² + 3p + 9p - 27 = 0
-p(p - 3) + 9(p -3) = 0
(-p + 9)(p - 3) = 0
p = 3, 9
c). The price that gives the maximum profit.
Vertex form: -2(p - 6)² + 18
Vertex of the given expression → (6, 18)
Maximum profit will be at p = 6.
Therefore, profit = -2(6 - 6)² + 18 = 18
x^2-7x-34=10 solve this equation using factorising and soling quadratics
Answer:
\(x=-7; x=11\)
Step-by-step explanation:
Let's bring 10 to the LHS first.
\(x^2-7x-44=0\).
At this point we need two numbers that add to -7 and multiply to -44. From the signs we can tell that the greater of the two is negative, and the smaller is positive. Furthermore, since \(44=11\times 4\) we found our two suspects: -11 and 4 (which indeed add up to -7)
Now we can factorize the equation as
\((x-11)(x+4) =0\)
which tells us that either \(x-11=0 \rightarrow x=11\) or \(x+7=0 \rightarrow x=-7\)
***I really need an answer quickly!***
What is the perimeter of the parallelogram?
Answer:
60
Step-by-step explanation:
this is starting to make me hate maths PLS HELP
Answer:
a) (5×103)=5000
(9×107)=90000000
5000×90000000=450000000000
or 4.5×10 restipa 11
b)(7×105)=700000
(2×102)=200
70000÷200=3500
or 3.5×10 restipa 3
Help ASAP give brainest
Answer:
B,D
Step-by-step explanation:
waiting for brainlist
Answer:
The correct answer here is B.
Step-by-step explanation:
Took the test
a. What is the nth fraction in the following sequence? 2
1
, 4
1
, 8
1
, 16
1
, 32
1
,… b. What is the sum of the first n of those fractions? To what number is the sum getting closer and closer? Two forces, A=80 N and B=44 N, act in opposite directions on a box, as shown in the diagram. What is the mass of the box (in kg ) if its acceleration is 4 m/s 2
?
A)an = 2*2^(n-1)`. B) `The sum of the first n fractions is `2*(2^n - 1)`.
a. The sequence is a geometric sequence with the first term `a1 = 2` and common ratio `r = 2`.Therefore, the nth term `an` is given by:`an = a1*r^(n-1)`
Substituting `a1 = 2` and `r = 2`, we have:`an = 2*2^(n-1)`
b. To find the sum of the first n terms, we use the formula for the sum of a geometric series:`S_n = a1*(1 - r^n)/(1 - r)
`Substituting `a1 = 2` and `r = 2`, we have:`S_n = 2*(1 - 2^n)/(1 - 2)
`Simplifying:`S_n = 2*(2^n - 1)
`The sum of the first n fractions is `2*(2^n - 1)`.As `n` gets larger and larger, the sum approaches `infinity`.
Thus, the sum is getting closer and closer to infinity.
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rectangle ABCD with diagonal AC, labeled as measuring 5 inches, angle BAC measuring 30 degrees, angle BCA measuring 60 degrees, angle DCA measuring 30 degrees, and angle DAC measuring 60 degrees. Rounded to the nearest tenth, what is the perimeter of rectangle ABCD?
Answer:
5 + 10\(\sqrt{3}\)
= 22.3205080757
Step-by-step explanation:
Answer:
≈ 13,7 inches
Step-by-step explanation:
Just use trigonometry (sin or cos) from the right triangles ∆ABC and ∆ADC
For the piecewise function, find the values h(- 5), h(0), h(1), and h(4).
Answer:
h(-5) = 2h(0) = 1h(1) = 3h(4) = 6Step-by-step explanation:
You want the value of the piecewise function for various values of x.
Piecewise functionThe first step in evaluating a piecewise function is determining which domain is applicable to the value of x you have. Then you use the corresponding function, evaluating it in the usual way.
h(-5)For x = -5, the applicable domain is x < -3, so the function is ...
h(-5) = -4(-5) -18 = 20 -18
h(-5) = 2
h(0)For x = 0, the applicable domain is -3 ≤ x < 1, so the function is ...
h(0) = 1
h(1), h(4)For x = 1 or 4, the applicable domain is x ≥ 1, so the function is ...
h(1) = 1 +2 = 3
h(4) = 4 +2 = 6
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What is the x- intercept of the line that represents y=-4x+12
Answer:
3,0
for steps
Step-by-step explanation:
math
way
Determine the surface area of a square pyramid that has a perimeter of 32 cm
and a slant height of 15 cm
Given that the perimeter of the square base is 32 cm, The surface area of the square pyramid is 304 cm².
The surface area of a square pyramid can be calculated using the formula: SA = B + (1/2)Pl, where B is the area of the base, P is the perimeter of the base, l is the slant height, and SA is the total surface area.
Given that the perimeter of the square base is 32 cm, we can divide it by 4 to find the length of each side: 32 cm / 4 = 8 cm.
Now, we can calculate the area of the base by squaring the length of a side: B = (8 cm)² = 64 cm²
Using the given slant height of 15 cm, we can plug in the values into the formula for SA: SA = 64 cm² + (1/2)(32 cm)(15 cm) = 64 cm² + 240 cm² = 304 cm².
Therefore, the surface area of the square pyramid is 304 cm².
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In the diagram below, AB = BD = BC, and mZA = 24°. Find
mZC.
Answer:
m∠C = 66°
Step-by-step explanation:
Since AB = BD, it means this triangle is an Isosceles triangle and as such;
∠BAD = ∠BDA = 24°
Thus, since sum of angles in a triangle is 180,then;
∠ABD = 180 - (24 + 24)
∠ABD = 180 - 48
∠ABD = 132°
We are told that BC = BD.
Thus, ∆BDC is an Isosceles triangle whereby ∠BCD = ∠BDC
Now, in triangles, we know that an exterior angle is equal to the sum of two opposite interior angles.
Thus;
132 = ∠BCD + ∠BDC
Since ∠BCD = ∠BDC, then
∠BCD = ∠BDC = 132/2
∠BCD = ∠BDC = 66°
Harry Potter decides it’s too cold for him to stay in Hogwarts and wants to fly straight south. He is not sure where to point his broomstick, considering that the wind is pretty strong at 21 km/h [S 55° E]. His broomstick has an airspeed of 18 m/s. Determine the heading he should have and the velocity of the broom with respect to the ground.
Harry Potter decides it’s too cold for him to stay in Hogwarts and wants to fly straight south, the heading he should have and the velocity of the broom with respect to the ground are mathematically given as
VR = 20, 699 m/s South
What is the heading he should have and the velocity of the broom with respect to the ground?Divide horizontal and vertical components of Vs and Vw vectors
For Vs
Vs = Vs cos∅ [s] + Vs Sin∅ [w]
Vs = 18 Co58 [s] + 18 sin∅ [w]
For Vw
Vw = Vw Cos 55' [s] + Vw Sin 55 [E]
5.8333 x Cos 55 (s) + 5-8333 Sin 55 [E]
Vw = 3.3458 [s] + 4.7783 [E]
Resultant velocity VR = Vs + Vw
VR= 18 Coso (s) + 18 sine [w] +3.3458 (5) +42783 (E)
VR = (186030 +3.3458) [5] + (18sing - 4.7183)6]
(Harry Potter) flies south
18sin∅ - 4.7783 18=0
Hence
Sin∅ = 4.7783 18/18
∅ =sin{-1}(4.7783 18/18)
∅ = 15.3943
Harry Potter flies in the direction south to ∅ = $15.3943w]
Hence velocity
VR = (18 cos∅ + 35452) s + 0
VR = (17.3541 +3-3458) s
VR = 20, 69999 m/s South
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Is algebra.
PLEASE HELP NO LINKS OR FILES.
I don't want links.
I don't want links.
I don't want links.
I don't want links.
Answer:
x = -11/7
x = 11/7
Step-by-step explanation:
49x² - 121
Factor
(7x + 11)(7x - 11)
roots
x = -11/7
x = 11/7
g(x)=√x-2+4 when x ≥ 2 and f(x) = 3x-4 when x < 2
The piecewise function G(x) = √(x - 2) + 4 when x ≥ 2 and f(x) = 3x - 4 when x < 2 defines two separate formulas for different ranges of x to calculate the output.
The given piecewise function consists of two separate functions defined for different ranges of x. For x greater than or equal to 2, the function G(x) is defined as the square root of x minus 2, with the result increased by 4. In mathematical notation, G(x) = √(x - 2) + 4, where x ≥ 2.
For x values less than 2, the function f(x) is defined as 3x minus 4. In mathematical notation, f(x) = 3x - 4, where x < 2.
The function G(x) represents the output when x is greater than or equal to 2, while the function f(x) represents the output when x is less than 2. This type of piecewise function is commonly used to define different formulas for different ranges of input values.
To evaluate the function for a specific value of x, you need to determine whether x is greater than or equal to 2 or less than 2. Based on that, you can use the corresponding formula to calculate the output.
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Solve the following equation
x²-10x+25=0
Answer:
X=5
Step-by-step explanation:
You want to factor the left side of the equation
(X-5)(x-5)=0
Set factors that will equal to 0
X-5=0
X=5 is the answer
(-1, 16), (-13, 6)
Write an equation in slope-intercept form.
help
Answer:
y=5/6x+101/6
Step-by-step explanation:
m=(y2-y1)/(x2-x1)
m=(6-16)/(-13-(-1))
m=-10/(-13+1)
m=-10/-12
simplify
m=5/6
y-y1=m(x-x1)
y-16=5/6(x-(-1))
y-16=5/6(x+1)
y-16=5/6x+5/6
y=5/6x+5/6+16
y=5/6x+5/6+96/6
y=5/6x+101/6
7. Which measure of center best describes Thea data? Which measure of variability?
The measure of variability are range, variance and standard deviation
Variability refers to the spread or dispersion of data points in a dataset. It helps us understand how closely or widely the data is distributed. Measures of variability provide insights into the degree of diversity or similarity among the values in the dataset. The three commonly used measures of variability are the range, variance, and standard deviation.
Range: The range is the simplest measure of variability and is calculated by subtracting the smallest value from the largest value in the dataset. It provides a rough estimate of the spread of the data but is sensitive to outliers. Therefore, the range alone may not provide a comprehensive understanding of variability.
Variance: Variance measures the average squared deviation of each data point from the mean. It quantifies the variability by taking into account the differences between each data point and the mean. A higher variance indicates greater variability in the dataset. Variance is denoted by σ² for a population and s² for a sample.
Standard Deviation: The standard deviation is the square root of the variance. It provides a measure of variability in the original units of the dataset, making it easier to interpret. The standard deviation is denoted by σ (sigma) for a population and s (lowercase sigma) for a sample. It is widely used because it is more intuitive and easier to compare between datasets.
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Carson's class voted on whether or not to do science fair projects in groups. 60% of the
10 votes were in favor of working in groups. how many votes were in favor?
The number of votes that were in favor of working in groups was 6 votes
Percentages are just fractions with the denominator 100. We use the percent symbol (%) to indicate that a number is a percentage. For example, if you correctly answered 75 out of 100 questions on a test, you would have gotten a 75% (75/100) mark.
Divide the amount by the total value and multiply the result by 100 to get the percentage. (Price/Total Price) The formula for computing percentages is 100%.
If 60% of the votes were in favor of working in groups, that means there were 60/100 * 10 votes = <<60/100*10=6>>6 votes in favor.
So, there were 6 votes in favor of working in groups.
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. Importance of hydrologic cycle The role of water is central to most natural processes - Transport - Weathering, contaminant transport - Energy balance - transport of heat, high heat capacity - Greenhouse gas - 80% of the atmospheric greenhouse effect is caused by water vapor - Life - for most terrestrial life forms, water determines where they may live; man is exception
The hydrologic cycle, also known as the water cycle, plays a crucial role in the Earth's natural processes. It involves the continuous movement of water between the Earth's surface, atmosphere, and underground reservoirs.
The importance of the hydrologic cycle can be understood by considering its various functions:
Transport: The hydrologic cycle facilitates the transport of water across the Earth's surface, including rivers, lakes, and oceans. This movement of water is vital for the distribution of nutrients, sediments, and organic matter, which are essential for the functioning of ecosystems.
Weathering and Contaminant Transport: Water plays a significant role in weathering processes, such as erosion and dissolution of rocks and minerals. It also acts as a carrier for contaminants, pollutants, and nutrients, influencing their transport through the environment.
Energy Balance: Water has a high heat capacity, which means it can absorb and store large amounts of heat energy. This property helps regulate the Earth's temperature and climate by transporting heat through evaporation, condensation, and precipitation.
Greenhouse Gas: Water vapor is a major greenhouse gas that contributes to the Earth's natural greenhouse effect. It absorbs and re-emits thermal radiation, trapping heat in the atmosphere. Approximately 80% of the atmospheric greenhouse effect is attributed to water vapor.
Life: Water is vital for supporting life on Earth. It provides a habitat for numerous organisms and serves as a medium for various biological processes. Terrestrial life forms, including plants, animals, and humans, rely on water availability for their survival, growth, and reproduction.
It is important to note that while water is critical for most terrestrial life forms, human beings have developed technologies and systems that allow them to inhabit regions with limited water availability. However, water still remains a fundamental resource for human societies, and the hydrologic cycle plays a crucial role in ensuring its availability and sustainability.
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if a and b are independent events with p(a) = 0.65 and p(a ∩ b) = 0.26, then, p(b) =
The chance of the event B is 0.4 when using the probability for the two independent two event formula.
In the given question, if a and b are independent events with p(a) = 0.65 and p(a ∩ b) = 0.26, then we have to find the value of p(b).
Events classified as independent do not depend on other events for their occurrence.
Event A's likelihood of happening is P(A)=0.65.
The likelihood of the two events A and B intersecting is P(A∩B)=0.26.
Given that the likelihood of the two independent events is:
P(A∩B) = P(A)⋅P(B)
Then the probability of the event B will be,
P(B) = P(A)/P(A∩B)
P(B) = 0.65/0.26
P(B) =0.4
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The breaking strength z (in pounds ) of a manila rope can be modeled by z=8900d^(2) , where d is the diameter (in inches ) of the rope. a. Describe the domain and range of the function.
The domain of the function is all positive real numbers, representing the possible diameters of the rope, while the range is all positive real numbers, indicating the potential breaking strengths of the manila rope.
The domain of the function is all positive real numbers since the diameter of a rope cannot be negative or zero. However, it is important to note that in practical terms, the diameter should also have a minimum value, typically determined by the manufacturing specifications or practical constraints.
The range of the function represents the possible breaking strengths of the manila rope. Since the function is defined as z = 8900d^2, where d is the diameter, the breaking strength (z) will always be a positive value. As the diameter increases, the breaking strength also increases, and there is no upper limit to the breaking strength. However, it is essential to consider practical limitations, such as the maximum load capacity of the material used or any physical constraints that may prevent the rope from achieving extremely high breaking strengths.
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a compound inequality is an inequality that combines two inequalities. write an compound inequality for the situation
Answer:
what situation?
Step-by-step explanation:
Answer:
a<x and x<b
Step-by-step explanation:
because there is no situation provided, here is an example of what it would be
If X is an exponential random variable with parameter λ, and c>0, show that cX is exponential with parameter λ/c.CDF Method:Let X be a continuous random variable and let Y=g(X)be a function of that random variable, where g(X) is some function of X. Let fX(x) be the probability density function (PDF) of X and fY(y) be the PDF of Y. Recall that the cumulative distribution function (CDF) of X is defined as the probability that X is less than or equal to some value x, for any real value of x. Mathematically,FX(x)=P(X≤x)Similarly, FY(y)=P(Y≤y).To find the distribution of Y, we can use the CDF method. We start by expressing the CDF of Y (FY(y)) in terms of X. We do this by using the fact that Y=g(X)and then solving the resulting inequality for X. Mathematically,FY(y)=P(Y≤y)=P(g(X)≤y)=⋯=P(X ???⋯)We isolate X in the inequality and we get an inequality which can be changed into CDF terms (the CDF of X).After we find the CDF of Y, we can differentiate it to get the PDF of Y. Recall that for any random variable, the first derivative of its CDF is equal to its PDF. In mathematical terms,fY(y)=ddyFY(y)We do this using the CDF of Y we obtained earlier. After completing this step, you will have the PDF of Y.
We have shown that cX is exponential with parameter λ/c when X is an exponential random variable with parameter λ and c > 0.
To show that cX is exponential with parameter λ/c when X is an exponential random variable with parameter λ, and c>0, we will use the CDF method:
1. Define the transformation: Let Y = cX be a function of the random variable X, where c > 0.
2. Find the CDF of Y: We want to find P(Y ≤ y), which is equal to P(cX ≤ y) or P(X ≤ y/c).
3. Express CDF of Y in terms of X: Since P(X ≤ y/c) is the CDF of X at y/c, we have FY(y) = FX(y/c).
4. Find the PDF of X: The exponential distribution has the PDF fX(x) = λ * exp(-λx) for x ≥ 0.
5. Differentiate the CDF of Y to find its PDF: To find fY(y), we differentiate FY(y) with respect to y. Using the chain rule, we have:
fY(y) = d(FX(y/c))/dy = fX(y/c) * (1/c)
6. Substitute the PDF of X: Now, we replace fX(y/c) with its exponential form λ * exp(-λ(y/c)):
fY(y) = (λ * exp(-λ(y/c))) * (1/c)
7. Simplify the expression: fY(y) = (λ/c) * exp(-λ(y/c))
This is the PDF of an exponential distribution with parameter λ/c. Therefore, cX is exponential with parameter λ/c when X is an exponential random variable with parameter λ and c > 0.
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I need help. I can't figure this question out.
A Hamilton multitouch watch was originally priced at $644. At a closing of the Alpha Omega Jewelry Shop, the watch is being reduced
by 1/2
What is the new selling price?
New selling price
Answer:
I think the answer is 322 because 1/2=50% which is equal to half
The volume, in cubic centimeters, of a fish tank is represented by the polynomial model V(x)=36x^2-3.75x^3. What is the maximum volume of the fish tank?
A. 384.00 cubic centimeters
B. 333.83 cubic centimeters
C. 472.85 cubic centimeters
D. 491.52 cubic centimeters
Answer:
D. 491.52
Step-by-step explanation:
OMG LAST QUESTION IDNSKSNKSKNDLKNKNDK
Answer:
1. 38 gallons per gas, 2. $3.74 per gallon
Step-by-step explanation:
Which expressions are equivalent to the one below? Check all that apply.
log 2 - log 6
A. log 3
B. log(2) + log
log(3)
C. log(3)
D. log 2
Answer:
c
Step-by-step explanation:
log2-log 6=log(2/6)=log (1/3)
log(2) + log(1/6)
log(1/3)
If sinA= find the value of sin2A
Step-by-step explanation:
sinA=sinA
sin2A
(sinA)2
It is given that the straight line y = (q + 2)x + 10 is parallel to the straight line 4x + 2y = 5. Find the value of q.
Answer:
q= -4
Step-by-step explanation:
First, simplify 4x+2y=5
2y=-4x+5
y=-2x+5/2
q+2 has to equal to -2
q = -4