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kupik [55]
2 years ago
8

A compact disc is designed to last an average of 4 years with a standard deviation of 0.9 years. What is the probability that a

CD will last less than 3 years?
1.11%
13.35%
86.65%
100%
Mathematics
1 answer:
jarptica [38.1K]2 years ago
4 0
 <span>3 is 1.0 below the mean. That is 1.0 / 0.9, or 1.1111... standard deviations below the mean. 
So look up z < -1.11 on your graphing calculator.
It should be around 0.1335 or 13.35%</span>
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gregori [183]

Answer:

$14.54

Step-by-step explanation:

We use the equation 32.18-17.64 to find our answer of $14.54

6 0
2 years ago
You purchased concentrated cleaner that must be diluted (watered down)
abruzzese [7]

Answer:

The volume of the concentrated 80 gallons mixture is 20 gallons

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Step-by-step explanation:

The given parameters are;

The content of Container A = The cleaner

The concentration of the cleaner = 20% solution

The content of Container B = Pure water

The concentration of the desired solution = 5%

The volume of the required solution = 80 gallons

Let x represent the volume of the concentrated solution and y represent the volume of water in the 80 gallons mixture

Therefore, we have;

20/100 × x + y×0 = 5/100×80

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y = 80 - x

20/100 × x + (80 - x)×0 = 5/100×80

0.2·x = 4

x = 4/0.2 = 20

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y = 60 gallons

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8 0
2 years ago
A company uses this formula to work out the cost, £A, of a taxi ride.
velikii [3]

Answer:

£b = £1.68

A = £44.68

Step-by-step explanation:

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A = 5 + 1.9m + b

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A = total cost

m = number of miles travelled

£b = charge for booking online

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A. Harry

A = £29.48

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£b = ?

A = 5 + 1.9m + b

29.48 = 5 + 1.9(12) + b

29.48 = 5 + 22.8 + b

29.48 = 27.8 + b

29.48 - 27.8 = b

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= 5 + 1.9(20) + 1.68

= 5 + 38 + 1.68

= 44.68

A = £44.68

7 0
2 years ago
Solve the equation.<br><br> −10x + 1 + 7x = 37
matrenka [14]
You combine like terms which are -10x and 7x and 1 and 37. Then it becomes -3x=36. x would equal to 36/-3, which is -12.
8 0
3 years ago
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swat32
25% of 80 is 20
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Your answer is 13
4 0
3 years ago
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