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Lemur [1.5K]
3 years ago
14

If an hourglass takes an average of 1 hour to empty a full cycle, what probability of time does it take longer than 72 minutes i

f the standard deviation is 5 minutes? (Make sure to use a percentage!)
Mathematics
1 answer:
Arturiano [62]3 years ago
7 0

Answer:

0.82%

Step-by-step explanation:

First find the z-score.

z = (x − μ) / σ

z = (72 − 60) / 5

z = 2.4

Use a chart or calculator to find the probability.

P(Z > 2.4) = 1 − P(Z < 2.4)

P(Z > 2.4) = 1 − 0.9918

P(Z > 2.4) = 0.0082

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When writing a recursive formula, whose initial term is 14 and whose
uysha [10]

Answer:

thx

Step-by-step explanation:

5 0
3 years ago
5×70=5×7 tens=_tens=_
bija089 [108]
5x70=5x7 tens= 35 tens= 350
7 0
3 years ago
Minnie organizes data in a table to show the net change in the number of people subscribing and unsubscribing to her blog each m
olchik [2.2K]

The factored expression which represents the net change in the number of blog subscriptions over 10 months is :

  • 3(11 - 7) + 4(-8)
  • Hence, the net change is -20

Change : -8, 11, -7, -7, -7, -8, -8, -8, 11, 11

To factor the values in the change variable :

-7 has a frequency of 3

-8 has a frequency of 4

11 has a frequency of 3

Values having the same frequency can be factored together :

Hence, we have ;

3(11 - 7) = 3(11 - 7) = 3(4) = 12 - - - - (1)

-8 having a value of 4 can be factored thus ; 4(-8) = -32 - - (2)

Joining both equations :

3(11-7) + 4(-8)

3(11 - 7) + 4(-8)

3(4) + 4(-8)

12 + (-32)

= - 20

Therefore, the factored expression for the net change in subscription is 3(11-7) + 4(-8)

Learn more :brainly.com/question/18904995

8 0
2 years ago
Who can answer this question
dimaraw [331]

Answer:

Answer is B 84ft

Step-by-step explanation:

It is this because this is a rectangle with an area of 112 with a triangle shape cut out of it. The area of that missing piece is 28 so do 112-28 and you get the answer of 84

7 0
3 years ago
Jonah finished 24 math problems in
8_murik_8 [283]

Answer:

3 hours

Step-by-step explanation:

In an hour there are 60 minutes to find the unit rate of problems per minute you divide 60/24 and get 2.5 multiply 2.5 by 72 get 180 in minutes that is 3 hours

3 0
3 years ago
Read 2 more answers
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