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vladimir2022 [97]
2 years ago
13

A company manufactures cd drives that sometimes experience disc-read errors. if a cd drive is tested for 250 read operations and

fails 4 times, what is the probability that a cd drive will fail? round your answer to the nearest tenth. the probability that a cd drive will fail is %.
Mathematics
1 answer:
andre [41]2 years ago
8 0

The probability that a Cd drive will fail is 1.6 %.

<h3>What is probability?</h3>

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty.

Given,

Cd tested = 250 read operations

Cd fails = 4 times

probability = \frac{Number of favourable outcomes}{Number of total outcomes}

here we have,

Probability = 4/250

= 0.016

= 0.016 × 100

= 1.6 %

To learn more about probability from the given link

brainly.com/question/9953973

#SPJ4

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The price of an item yesterday was $140. Today, the price fell to $63. Find the percentage increase.
Bond [772]

Answer:

The answer is $77.00

Step-by-step explanation:

$140 - $63= $77.00

I hope this helps!

5 0
3 years ago
Which elements in the same below are integers? -3,3.7,9,-7.34,2.83,5,56/7,-1
Bogdan [553]

Answer:

Integers -3, 9, 5, 56/7, -1

Step-by-step explanation:

Integers are whole numbers that can be positive or negative. They do not have decimals.

4 0
4 years ago
Express the complex number in trigonometric form.<br> -6 + 6 sqrt3 i
11Alexandr11 [23.1K]

Answer:

The trigonometric form of the complex number is 12(cos 120° + i sin 120°)

Step-by-step explanation:

* Lets revise the complex number in Cartesian form and polar form

- The complex number in the Cartesian form is a + bi

-The complex number in the polar form is r(cosФ + i sinФ)

* Lets revise how we can find one from the other

- r² = a² + b²

- tanФ = b/a

* Now lets solve the problem

∵ z = -6 + i 6√3

∴ a = -6 and b = 6√3

∵ r² = a² + b²

∴ r² = (-6)² + (6√3)² = 36 + 108 = 144

∴ r = √144 = 12

∵ tan Ф° = b/a

∴ tan Ф = 6√3/-6 = -√3

∵ The x-coordinate of the point is negative

∵ The y-coordinate of the point is positive

∴ The point lies on the 2nd quadrant

* The measure of the angle in the 2nd quadrant is 180 - α, where

  α is an acute angle

∵ tan α = √3

∴ α = tan^-1 √3 = 60°

∴ Ф = 180° - 60° = 120°

∴ z = 12(cos 120° + i sin 120°)

* The trigonometric form of the complex number is

  12(cos 120° + i sin 120°)

 

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3 years ago
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3 years ago
Find the nth term of this quadratic sequence :<br> 4,7,12,19,28
Nana76 [90]
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I attached a picture of my working out

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