The integral ∫x/√(x²+1) dx is equal to √(x² + 1) + C where c is the constant of integration.
To evaluate the integral ∫x/√(x²+1) dx, we can use a substitution.
Let's let u = x² + 1.
Then, differentiating both sides with respect to x:
we have du = 2x dx, which implies that dx = du/(2x).
Substituting these values into the integral, we get:
∫x/√(x²+1) dx = ∫(x/(2x)) × (1/√(x²+1)) du
= (1/2) ∫(1/√u) du
= u^(1/2) + C.
Finally, substituting back u = x² + 1, we obtain:
∫x/√(x²+1) dx = √(x² + 1) + C,
where C represents the constant of integration.
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An assembly line has two inspectors . The probability that the first inspector will miss a defective item is 0.09. If the defective item passes the first inspector, the probability that the second inspector will miss it is 0.08. What’s the probability that a defective item will pass by both inspectors?
Answer:
0.072
Step-by-step explanation:
0.09 × 0.08
Here's the diagram/ explanation
I want you to find the answer
The value of length BC is 18.9
What is cosine rule?Cosine Rule states that the square of the length of any side of a given triangle is equal to the sum of the squares of the length of the other sides minus twice the product of the other two sides multiplied by the cosine of angle included between them.
Therefore,
c² = a² + b² - 2abcosC
To find the length BC we use cosine rule.
c² = 13² + 7² - 2(13)(7)cos140
c² = 218 - 182cos140
c² = 218-(-139.42)
c² = 218+139.2
c² = 357.2
c = √357.2
c = 18.9
Therefore, the length of BC is 18.9
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In the triangle, the value of the side BC is 18.9cm to 1 decimal place
How to determine BC?The side BC can be found using the cosine formula, Remember that Cosine Rule states that the square of the length of any side of a given triangle is equal to the sum of the squares of the length of the other sides minus twice the product of the other two sides multiplied by the cosine of angle included between them.
The cosine formula states that
c² = a² + b² - 2abcosC
To find the length BC we use cosine rule.
c² = 13² + 7² - 2(13)(7)cos140
c² = 218 - 182cos140
c² = 218-(-139.42)
c² = 218+139.2
c² = 357.2
c = √357.2
c = 18.9
In conclusion, the value of the length of BC is 18.9cm
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Where does the normal line to the paraboloid z = x2 + y2 at the point (1, 1, 2) intersect the paraboloid a second time?
Answer:
the intersection point is ( -5/4, -5/4, -9/8)
Step-by-step explanation:
F(x,y,z) = x² +y² -z= 0
Then find differential of each terms then we have
∀f(x)=2x
∀f(y)=2y
∀f(z)=-1
The partial differential which is the director vector is at F(x,y,z)= (1,1,2)
Vf(1,1,2) = (2,2,-1)
But the given point is ( 1.1,2)
Then the parametric equation of normal line will be
x= 1+2t
y= 1+2t
z= 2 -t
The parametric equation can be formed as
(1+2t)² + (1+2t)² - (2-t)= 0
If we expand the expression above we have,
2(1+4t+4t²) - 2+t= 0
0= 8t² + 9t
t= 0 or t= -9/8
Substitute the value of t into the parametric equation above
At t=0
x= 1+2t; x= 1+2(0)=1
y= 1+2t; y= 1+2(0)=1
z=2 -t ; z= 2-(0)= 2
At =0 , we have (1,1,2)
At t= -9/8
x= 1+2t; x= 1+2(-9/8)=-5/4
y= 1+2t; y= 1+2(-9/8)=-5/4
z=2 -t ; z= 2-(-9/8)= -9/8
Therefore, the intersection point is ( -5/4, -5/4, -9/8)
The normal intersects the paraboloid at \((-\frac{5}{4},-\frac{5}{4},\frac{25}{8} )\)
Paraboloid:A surface all of whose intersections by planes are either parabolas and ellipses or parabolas and hyperbolas.
Given function is,
\(z = x^2 + y^2\)
We can write the given function as,
\(F(x,y,z)=x^2+y^2-z\)
Compute the gradient \(F\) by using the formula,
\(\nabla F(x,y,z)=\left\langle 2x,2y,-1\right\rangle\)
At (1,1,2) we get,
\(\nabla F(x,y,z)=\left\langle 2,2,-1\right\rangle\)
The equation of the tangent plane at (1,1,2) is,
\(2(x-1)+2(y-1)-(z-2)=0\\2x+2y-z-2=0\\\frac{x-1}{2}=\frac{y-1}{2}=\frac{z-2}{-1}=t\\ x=2t+1,y=2t+1,z=-t+2\)
Replace the values of \(x,y,z\) in \(z = x^2 + y^2\) and then solve for \(t\) then,
\(-t+2=(2t+1)^2+(2t+1)^2\\8t^2+9t=0\\t=0,-\frac{9}{8}\)
Substituting the value into the parametric equations,
\(x=2(-\frac{9}{8} )+1,y=2(-\frac{9}{8} )+1,\ and \ z=-(-\frac{9}{8} )+2\\x=-\frac{5}{4}, \ y= -\frac{5}{4} ,z=\frac{25}{8}\)
Therefore, the normal intersects the paraboloid at \((-\frac{5}{4},-\frac{5}{4},\frac{25}{8} )\)
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Johannas is building a square sandbox with sides 3 feet long. He wants to put sand 1.05 feet deep in the box. How many cubic feet of sand should Johannas order?
We make the drawing
now we can use the formula of the volume of a prism
\(V=l\times w\times h\)where l is the length, w the width and h the height
then replacing
\(\begin{gathered} V=3\times3\times1.05 \\ V=9.45 \end{gathered}\)Johannas should order 9.45 cubic feet of sand
The ratio of basketball players to baseball players at Cypress High School is 4 to 3. If Coach Nelson has 20 basketball players, how many players does he have for basketball and baseball combined?
Answer:
i think it is 15
A bus travels 324 km in 8 hours. How long will it take to travel 243 km ?
Answer:
Six hours
Step-by-step explanation:
Answer:
6 hours
Step-by-step explanation:
Use a ratio and cross multiply to solve for x
324 243
------ = -------
8 x
324x = (8)(243)
324x = 1944
x = 6
What is 29% of 150?
Show work
Answer:
To find 29% of 150, we can first express 29% as a decimal by dividing 29 by 100. 29% is the same as 0.29.
Then, we multiply 0.29 by 150 to find the answer:
0.29 * 150 = 43.5
So, 29% of 150 is equal to 43.5.
Here's the work:
29% * 150 = 0.29 * 150 = 43.5
\(\huge\text{Hey there!}\)
\(\mathsf{29\%\ of \ 150}\)
\(\mathsf{= \dfrac{29}{100} \ of \ 150}\)
\(\mathsf{= \dfrac{29}{100} \times 150}\)
\(\mathsf{= \dfrac{29}{100} \times \dfrac{150}{1}}\)
\(\mathsf{= \dfrac{29(150)}{100(1)}}\)
\(\mathsf{= \dfrac{4,350}{100}}\)
\(\mathsf{= \dfrac{4,350 \div 50}{100 \div 50}}\)
\(\mathsf{= \dfrac{87}{2}}\)
\(\mathsf{= 43 \dfrac{1}{2}}\)
\(\mathsf{= 43.5}\)
\(\huge\text{Therefore, your answer should be:}\)
\(\huge\boxed{\mathsf{\dfrac{87}{2}}}\huge\checkmark\)
\(\huge\boxed{\mathsf{43 \dfrac{1}{2}}}\huge\checkmark\)
\(\huge\boxed{\mathsf{43.5}}\huge\checkmark\)
\(\large\text{Either of those should work because they are all equivalent to each}\\\large\text{other}\uparrow\)
\(\huge\text{Good luck on your assignment \& enjoy your day! }\)
Kaitlin received a $2100 bonus. she decided to invest in a 2 year certificate of deposit with an annual interest rate of 1.13% compounded monthly.
Assuming no withdrawals are made, how much money is in kaitlins account after 2 years?
How much interest is earned on kaitlins investment after 2 years?
Answer:
interest rate is .000951667 and total interest gained is 47.98 and total money in the bank account is 2147.98
Step-by-step explanation:
you have to find the interest rate then multiply it by 1 year then put it to the power of 24. 24 because you have 34 months in 2 years
I need help on this onee pleasee
Answer:
1. 2nd row multiplied by the 3 columns : 7x³ , -35 x²,42
2. 3rd row multiplied by the 3 columns : -4x² , 20x ,-24
Step-by-step explanation:
The table requires you to perform multiplication of the terms
The product is as follows;
1. 2nd row multiplied by the 3 columns
7x * x² = 7x³
7x * -5x = -35 x²
7x * 6 = 42
2. 3rd row multiplied by the 3 columns
-4 * x² = -4x²
-4 * -5x = 20x
-4*6 = -24
Joel received a $8.00 tip from a customer who had a $50.00 bill.
Which decimal represents the fraction of the bill Joel received as a tip?
A 0.08
B 0.16
C 0.22
D 0.625
Answer:
The answer is D
Step-by-step explanation:
simplify 3(x-y)+3x+2
Answer:
6x-3y+2
Step-by-step explanation:
I AM BIG BRAIN
can I get a step by step explanation Thnx
Answer:
( 2A - kn) /k = m
Step-by-step explanation:
A = k/2(m+n)
Multiply each side by 2/k
2/k *A =2/k * k/2(m+n)
2A /k = m+n
Subtract n from each side
2A /k - n = m+n -n
2A /k - n = m
Getting a common denominator
2A/k - kn/k = m
( 2A - kn) /k = m
Answer:
Step-by-step explanation:
\(A=\frac{k(m+n)}{2}\\2A=k(m+n)\\\frac{2A}{k} =m+n\\\frac{2A}{k}-n=m\\2A-kn=km\\\frac{(2A-kn)}{k}=m\)
1
How many ounces are in 3
pounds and 6 ounces?
2.
7
ounces
32
62 ounces
1
ounces
1
99 ounces
2
Step-by-step explanation:
it's 54 ounces.........
Please help me find the domain in interval notation.
Answer:
I think the answer is -3≤x≤∞
Step-by-step explanation:
An alternative hypothesis would state that there A. is not B. could be C. is D. might be a difference between a sample mean and the population mean.
SOLUTION:
An alternative hypothesis would claim that there a difference between the sample and population mean claimed.
An alternate hypothesis directly contradicts the null.
i need the answer thank you<3
Answer:
The area is 15 units^2
Step-by-step explanation:
Area = ((a+b)/2) x h
= ((4+6)/2) x 3
= ((10)/2) x 3
= (5) x 3
= 15 units^2
Missing numbers
, 9.8 , 9.1
Answer:
10.5
Step-by-step explanation:
Missing number, 9.8, 9.1
We see that each time it subtracts 0.7
We take
9.8 + 0.7 = 10.5
So, the missing number is 10.5
Which of the following expense items should be included when determining whether a taxpayer who wishes to file as head of household paid more than half the cost of keeping up their home? Education. Medical expenses. Real estate taxes. Rental value of the home owned by the taxpayer.
The item would be the rental value of the home owned by the taxpayer. The correct option is D.
What is a taxpayer?A taxpayer is a person or organization that is required to pay taxes. Modern taxpayers may have an identification number, which is a reference number issued by the government to individuals or businesses. The term "taxpayer" generally refers to someone who pays taxes.
A recurring payment made by a tenant to a landlord in exchange for the use of land, a building, an apartment, an office, or other property. a payment made by a lessee to an owner in exchange for the use of machinery, equipment, etc.
A taxpayer who wishes to file as head of household paid more than half the cost of keeping up their home will be the rental value of the home owned by the taxpayer.
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Find the ordered pair that represents the vector from A(9,2) to B(-6,3). Then find the magnitude of AB
the first n terms of the progression. The first term and common difference of an arithmetic progression are a and -2. respectively. The sum of the first n terms is equal to the sum of the first 3n terms Express a in terms of n. Hence, show that n = 7 if a = 27.
If a is the first term of an AP with common difference -2, then the first several terms are
a, a - 2, a - 4, a - 6, a - 8, …
with n-th term a - 2 (n - 1).
The sum of the first n terms is equal to the sum of the first 3n terms :
\(\displaystyle \sum_{i=1}^n (a-2(i-1)) = \sum_{i=1}^{3n} (a-2(i-1))\)
We have
\(\displaystyle \sum_{i=1}^N (a-2(i-1)) = (a+2)\sum_{i=1}^N - 2\sum_{i=1}^Ni = (a+2)N - 2\cdot\dfrac{N(N+1)}2 = (a+1)N-N^2\)
so that in the previous equation, the sums reduce to
\((a+1)n-n^2 = (a+1)(3n)-(3n)^2\)
Solve for a :
\((a+1)n-n^2 = (a+1)(3n)-(3n)^2 \\\\ (a+1)n-n^2 = (a+1)(3n)-9n^2 \\\\ 9n^2-n^2 = (a+1)(3n)-(a+1)n \\\\ 8n^2 = (a+1)(2n) \\\\ 4n = a+1 \\\\ \boxed{a=4n-1}\)
Now if a = 27, we have
27 = 4n - 1
28 = 4n
n = 7
as required.
Do not understand this question
Answer:
A, C
Step-by-step explanation:
You want all the shapes that are enlargements of shape X, which is 1 unit high and 3 units wide.
EnlargementAn enlargement of shape X multiplies each of its dimensions by the same factor. When it is enlarged by a factor of 2, the dimensions become ...
high : wide = 1 : 3 = 2 : 6 . . . . . . matches shape C
When it is enlarged by a factor of 3, the dimensions become ...
high : wide = 1 : 3 = 3 : 9 . . . . . . . matches shape A
The 2-high shape B is too short, being 4 1/2 wide instead of 6. Shape F is too long, being 7 wide instead of 6.
The 3-high shapes D and E are too short, being 8 and 5 wide instead of 9.
__
Additional comment
An enlargement preserves the aspect ratio of the shape, the height to width ratio. Here, that is 1:3. Any shape with a different aspect ratio is not an enlargement of X.
Prince bougth
bougth 50 pineapples at
0.50$ each and sold all for 31.00$
Calculate the profit on the 50 pineapples
Answer:
Answer and steps in picture.
I need help with geometry! I need to find x and y, please help asp
Check the picture below.
Pls answer report if bad answer
Answer:
18
Step-by-step explanation:
24 x 3/4 = 18.
please help ill do anything 12 - 5z; z=2
Answer: the answer is 2
Step-by-step explanation:
1. 5 x 2 = 10
2. 12 -10 = 2
hope this helps!!
Income You are starting your first job as an assistant manager at a
sporting goods store. You receive a base salary of $14.75 per hour with
time-and-a-half for hours in excess of 40 hours per week. You are paid
every two weeks. Social Security and Medicare are deducted from your
pay. Social Security tax is 6.2% of the gross pay. Medicare tax is 1.45% of
the gross pay. What is the bi-weekly (every two weeks) deduction for
Social Security and Medicare? *
O $118.00
O $76.50
$89.90
$90.27
The bi-weekly deduction for Social Security and Medicare is $90.27.
Since you receive a base salary of $ 14.75 per hour with time-and-a-half for hours in excess of 40 hours per week, and you are paid every two weeks, and Social Security and Medicare are deducted from your pay, and Social Security tax is 6.2% of the gross pay, and Medicare tax is 1.45% of the gross pay, to determine what is the bi-weekly (every two weeks) deduction for Social Security and Medicare, the following calculation must be performed:
(14.75 x 40 x 2) x ((1.45 + 6.2) / 100) = X 1180 x 0.0765 = X 90.27 = X
Therefore, the bi-weekly deduction for Social Security and Medicare is $90.27.
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A donut store has 11 different types of donuts. You can only buy a bag of 3 of them, where each donut has to be of a different type from the rest. How many different bags of 3 can you make
Answer:
\(165\).
Step-by-step explanation:
Since repetition isn't allowed, there would be \(11\) choices for the first donut, \((11 - 1) = 10\) choices for the second donut, and \((11 - 2) = 9\) choices for the third donut. If the order in which donuts are placed in the bag matters, there would be \(11 \times 10 \times 9\) unique ways to choose a bag of these donuts.
In practice, donuts in the bag are mixed, and the ordering of donuts doesn't matter. The same way of counting would then count every possible mix of three donuts type \(3 \times 2 \times 1 = 6\) times.
For example, if a bag includes donut of type \(x\), \(y\), and \(z\), the count \(11 \times 10 \times 9\) would include the following \(3 \times 2 \times 1\) arrangements:
\(xyz\).\(xzy\).\(yxz\).\(yzx\).\(zxy\).\(zyx\).Thus, when the order of donuts in the bag doesn't matter, it would be necessary to divide the count \(11 \times 10 \times 9\) by \(3 \times 2 \times 1 = 6\) to find the actual number of donut combinations:
\(\begin{aligned} \frac{11 \times 10 \times 9}{3 \times 2 \times 1} = 165\end{aligned}\).
Using combinatorics notations, the answer to this question is the same as the number of ways to choose an unordered set of \(3\) objects from a set of \(11\) distinct objects:
\(\begin{aligned}\begin{pmatrix}11 \\ 3\end{pmatrix} &= \frac{11 !}{(11 - 3)! \times 3 !} \\ &= \frac{11 !}{8 ! \times 3 !} \\ &= \frac{11 \times 10 \times 9}{3 \times 2 \times 1} = 165\end{aligned}\).
Evaluate s - t if s = 1/4 and t = -1.75. Write your answer in simplest form.
The value of s - t is 2.
It is given in the question that:-
s = 1/4 and,
t = -1.75
We can convert the decimal form of t in the fractional form.
-1(3/4) = -7/4
Hence, according to the data given in the question we can write,
s - t = (1/4)-(-7/4) = (1+7)/4 = 8/4 = 2.
Decimal
In Algebra, decimals are one of the types of numbers, which has a whole number and the fractional part separated by a decimal point. The dot present between the whole number and fractions part is called the decimal point. For example, 34.5 is a decimal number.
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Jack ran a marathon in 2 hours and 17 minutes. He crossed the finish line at 10:33 a.m. What time did the race start?
Answer:
8:16 am
Step-by-step explanation:
PLEASE ANSWER ASAP FOR BRAINLEST!!!!!!!!!!!!!!!!!!
Answer:
pulling a king out of a deck of cards
Step-by-step explanation:
A compound event is more than one thing happening
The only item listed that has only one thing happening is pulling a king out of a deck of cards, so that is the only one that is not a compound event