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
luda_lava [24]
3 years ago
7

Select the situation that describes the following expression.coalယ​

Mathematics
1 answer:
Mazyrski [523]3 years ago
8 0

Answer:

what are the things at the end.

Step-by-step explanation:

You might be interested in
Consider the function f given by f(x)=x*(e^(-x^2)) for all real numbers x.
NISA [10]

Answer:

\frac{\sqrt{\pi}}{4}

Step-by-step explanation:

You are going to integrate the following function:

g(x)=x*f(x)=x*xe^{-x^2}=x^2e^{-x^2}  (1)

furthermore, you know that:

\int_0^{\infty}e^{-x^2}=\frac{\sqrt{\pi}}{2}

lets call to this integral, the integral Io.

for a general form of I you have In:

I_n=\int_0^{\infty}x^ne^{-ax^2}dx

furthermore you use the fact that:

I_n=-\frac{\partial I_{n-2}}{\partial a}

by using this last expression in an iterative way you obtain the following:

\int_0^{\infty}x^{2s}e^{-ax^2}dx=\frac{(2s-1)!!}{2^{s+1}a^s}\sqrt{\frac{\pi}{a}} (2)

with n=2s a even number

for s=1 you have n=2, that is, the function g(x). By using the equation (2) (with a = 1) you finally obtain:

\int_0^{\infty}x^2e^{-x^2}dx=\frac{(2(1)-1)!}{2^{1+1}(1^1)}\sqrt{\pi}=\frac{\sqrt{\pi}}{4}

5 0
3 years ago
Read 2 more answers
It takes a train 8 hours to travel a distance of 216 km. What is the average speed of the train?
Contact [7]

(S=D/T)S=216KM, T=8HOURS : 216/8=27KM/HOUR

3 0
3 years ago
How do i get 28 and 13 gallons to 17 gallons i really need help with it as soon as i can
iogann1982 [59]
Take 11 gallons out of 28 and put 4 more gallons in 13
8 0
3 years ago
A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Fi
sladkih [1.3K]

The ground, the building, and the ladder form a right triangle, in which
the leaning ladder is the hypotenuse.

For the angle between the ladder and the ground, the 4-ft along the ground
is the side adjacent to the angle, and the 7-ft ladder is the hypotenuse.

         (adjacent side) / (hypotenuse) = cosine of the angle.

                                         Cosine(a) = 4/7 = 0.57143... (rounded)

                                                    Angle 'a' = <em>55.15 degrees</em> (rounded)

7 0
3 years ago
Read 2 more answers
5x+2y=-3;x+5y=4<br>plz answer me​
Alex17521 [72]

Answer:

x = -1 and y = 1

Step-by-step explanation:

5x + 2y = -3 . . . . . . . (i)

x + 5y = 4 . . . . . . . (ii)

  • Finding x in terms of y from eq. (ii) :-

x + 5y = 4

x = 4 - 5y

  • Placing this value of x in eq. (i) :-

5(4 - 5y) + 2y = -3

20 - 25y + 2y = -3

-23y = - 23

<u>y = 1</u>

  • Placing the value of y in eq. (i)

5x + 2(1) = -3

5x + 2 = -3

5x = - 5

<u>x = -1</u>

7 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose it took 19 riders a total of 11 days 21 hours to ride from st Jospeh to Sacramento. If they all rode the same number of
    8·1 answer
  • Approximately what percentage of iq scores falls between 70 and 130?
    12·1 answer
  • One nautical mile per hour is equivalent to one knot. true or false
    6·2 answers
  • In a randomly generated list of numbers from 0 to 4, the chances that each number can occur is 1/5
    14·2 answers
  • Charlene puts together two isosceles triangles so that they share a base, creating a kite. The legs of the triangles are 10 inch
    15·2 answers
  • Convert to a form that reveals the zeros
    12·1 answer
  • The graph shows the relationship between the amount of milk and water used in a recipe
    12·1 answer
  • A 12 foot ladder is placed against the side of the building. The base of the ladder is placed at an angle of 68° with the ground
    15·1 answer
  • Can some one help me do this question <br> just give me e and f
    5·1 answer
  • A grocery store polls every twentieth customer to determine if they are satisfied with the cleanliness of the store. Forty custo
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!