1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dusya [7]
2 years ago
5

How do I solve this?

Mathematics
1 answer:
malfutka [58]2 years ago
8 0

a) Recall the integration by parts formula:

\displaystyle \int u \, dw = uw - \int w \, du

Then with u = x and dw = e^x\,dx we have

\displaystyle v = \int e^x x \, dx = xe^x - \int e^x \, dx

\implies \boxed{v = xe^x - e^x + C}

since w=\int e^x\,dx=e^x and du=dx. (C is of course an arbitrary constant that can be determined exactly if you know the velocity at some given value of x.)

b) No?

\displaystyle \int e^xx\,dx = \int xe^x\,dx

because multiplication is commutative. I get the feeling I'm missing something here...

You might be interested in
While on vacation in Rockport, Shawn went out for a dinner that
inessss [21]
The total cost is $62
3 0
3 years ago
Read 2 more answers
Please answer this question, I will give 5 stars and thanks, even if it is incorrect. If you have any questions, go to "Ask For
Ede4ka [16]

Answer:

the theoretical probability is 1/5.

the experimental probability is 3/10.

chances are the experimental probobility will approach the theoretical probobility.

Step-by-step explanation:

since blue is one of five equal sizes, the probobility that it will land on blue is 1/5.

the expiromental probobility is the number of times it landed on blue devided by the number of spins. 15/50. this can be simplified by pulling out a 5, leaving us with 3/10.

last it stands to reason that the more times the spinner is spun the closer the experimental probability will model the theoretical probability.

3 0
4 years ago
Please help with this question.
Naddik [55]

9514 1404 393

Answer:

  136

Step-by-step explanation:

The attached chart shows the result of using the numbers in the problem statement to calculate the percentage of the population in each category.

95% accuracy on infected individuals is assumed to mean that 95% of the 2% who are infected return a positive test result. The other 5% return a negative test result.

Similarly, 90% accuracy on uninfected individuals is assumed to mean that 90% of the 98% who are not infected will return a negative test result, and the remaining 10% of those 98% will return a (false) positive test result.

Then of the 11.7% who return a positive test result, only 1.9% are actually infected. This fraction is a/b = 19/117, so ...

  a + b = 19 + 117 = 136

_____

<em>Additional comment</em>

When forming ratios of percentages, one must be very clear about the base of the percentage. Above, the base for every percentage is the entire population of mathletes. The fraction 19/117 is the fraction of those who tested positive that are actually infected (about 16.2% of positives).

3 0
3 years ago
Read 2 more answers
14 is a blank of 7 and 14
LiRa [457]
14 is a multiple of 7 and 14
6 0
3 years ago
a flomming tile has the shape of a parallelogram whose base is 24cm and height is 10 cm how many tiles are required to cove the
g100num [7]

Answer:

4 1/2 tiles are needed to cover this area

Step-by-step explanation:

Mathematically, the area of a parallelogram is the product of the base and the height

We have this as;

24 * 10 = 240 cm^2

So the area of a tile is this

The number of tiles that will cover the given area will be;

1080/240 = 4.5 tiles

4 0
3 years ago
Other questions:
  • A football team paid 28 per jersey. they bought 16 jerseys .how much money did they spent on the jerseys.
    13·2 answers
  • Select whether the equation has a solution or not.<br> - 16x+ 1 -5 = -7 - 1/3x+ 1
    8·1 answer
  • In a bag of oranges, the ratio of the good ones to the bad ones is 5:4. If the number of bad ones in the bag is 36, how many ora
    9·1 answer
  • In 10⁶,the 10 is the​
    10·2 answers
  • What is the factores form of 4x^2+23x-72
    7·1 answer
  • What’s the greatest common factor of 33 and 66
    11·1 answer
  • Probabilities with Rocks
    13·1 answer
  • Convert 3 kilograms to ounces
    10·1 answer
  • Round to the nearest hundredth place 2.8457
    13·2 answers
  • HELP me pleaseee I can’t do it ima drop
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!