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xenn [34]
2 years ago
9

A set of cards contains the numbers 1 through 20. Mathieu chooses a card at random, records the number of the card, and then ret

urns the card to the set. He conducts 200 trials of this event. Based on the theoretical probability, how many times can Mathieu expect to choose a multiple of 5?
10
20
40
50
Mathematics
1 answer:
Vitek1552 [10]2 years ago
6 0

Answer:

20

Step-by-step explanation:

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Use the Shell Method to find the volume of the solid obtained by rotating region under the graph of f(x)=x^2+2 for 0≤x≤5 about x
Irina18 [472]

For each <em>x</em> in the interval 0 ≤ <em>x</em> ≤ 5, the shell at that point has

• radius = 5 - <em>x</em>, which is the distance from <em>x</em> to <em>x</em> = 5

• height = <em>x</em> ² + 2

• thickness = d<em>x</em>

and hence contributes a volume of 2<em>π</em> (5 - <em>x</em>) (<em>x</em> ² + 2) d<em>x</em>.

Taking infinitely many of these shells and summing their volumes (i.e. integrating) gives the volume of the region:

\displaystyle 2\pi \int_0^5 (5-x)(x^2+2)\,\mathrm dx=2\pi\int_0^5 (10-2x+5x^2-x^3)\,\mathrm dx=\boxed{\frac{925\pi}6}

4 0
3 years ago
GIVING AWAY BRAINLIEST READ THE QUESTION!
ozzi

Answer:

C

Step-by-step explanation:

A function is constant when the y value does not change when the x value does

The function is constant during section C

7 0
3 years ago
A shark is swimming 28 ft below sea level. If the angle of depression from a boat on the water to the shark is 19 degrees, what
Orlov [11]

Answer:

81,3 ft to the nearest tenth.

Step-by-step explanation:

Tan 19 = 28 / h  where h = the horizontal distance.

h = 28 / tan 19

h = 81.3 ft.

3 0
3 years ago
Determine the scale factor for each pair of triangles
Alik [6]

Triangle A is the original triangle, and triangle A' is the image.

We need a pair of corresponding sides in the two triangles that are both labeled with lengths.

We see the side labeled 15.2 mm in triangle A', and we see the side labeled 3.8 mm in triangle A. These two sides are corresponding sides.

Divide the length of the side in the image by the length of the side in the original to find the scale factor.

(15.2 mm)/(3.8 mm) = 4

The scale factor is 4.

6 0
3 years ago
15 points please IF NOT YOUR COMMENT WOULD BE REPORTED ALSO YOUR ACCOUNT pls thank you ☺️
HACTEHA [7]

Answer:

A

Step-by-step explanation:

Given

\sqrt{qrv+11} = 30 ( square both sides to clear the radical )

qrv + 11 = 900 ( subtract 11 from both sides )

qrv = 889 ( divide both sides by rv )

q = \frac{889}{rv} → A

3 0
3 years ago
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