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Inga [223]
3 years ago
6

An oil prospector will drill a succession of holes in a given area to find a productive well. The probability that he is success

ful on a given trial is .2. a What is the probability that the third hole drilled is the first to yield a productive well
Mathematics
1 answer:
horrorfan [7]3 years ago
3 0

Answer:

0.128 is the probability that the third hole drilled is the first to yield a productive well.

Step-by-step explanation:

We are given the following information in the question:

The probability that he is successful on a given trial is 0.2    

p = 0.2

q = 1 - p = 0.8

We define the geometric probability as:

P(X=x) = p(1-q)^{x-1}

For this we have x = 3, putting the values we have:

P(X=x) = p(1-q)^{x-1}\\P(x=3) = 0.2(0.8)^2 = 0.128 = 12.8\%

0.128 is the probability that the third hole drilled is the first to yield a productive well.

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4) The area of a piece of pie in the shape of a sector is 7.1 in. The angle of the sector is 40°. Find the diameter of
elixir [45]

Answer:

Step-by-step explanation:

Area of sector = angle/360 * pi * r^2

7.1 = 40/360 * 22/7 * r^2

7.1 = 1/9 * 22/7 * r^2

63.9 = 22r^2/7

r^2 = (7 * 63.9)/22

r^2 = 20.331818181818

r = square root of 20.331818181818

r = 4.51

d = r * 2 = 4.51 * 2 = 9.02

4 0
3 years ago
The length of one leg of a right triangle is 24ft and the length of the hypotenuse is 40ft what is the length of the other leg
lukranit [14]
Use formula a squared equals to c squared minus b squared

40^2-24^2 is 1024

Square root of 1024 is 32.0
8 0
3 years ago
Read 2 more answers
Please help on question 12 or 13 as soon as possible
Anna007 [38]

Answer:

to know the summation of angles: (n-2)*180

here (n) represent numbers of sides

12)we have 5 sides (n=5)

(5-2)*180=540

x=540-(105+135+92+87)=121

13)we have 8 sides (n=8)

(8-2)*180=1080

x=1080-(116+158+141+124+136+132+129)=144

I hope it will help

3 0
2 years ago
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natali 33 [55]

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8 0
3 years ago
A 1.8-ounce jar cinnamon costs $4.05. What is the cost per ounce?
Paha777 [63]
$4.05/1.8 oz= $2.25 per oz

Final answer: $2.25 per oz
6 0
3 years ago
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