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evablogger [386]
3 years ago
7

1. How long is 50% of 60 minutes? 2. How long is 10% of 60 minutes? 3. How long is 75% of 60 minutes?

Mathematics
2 answers:
babunello [35]3 years ago
7 0

Answer:

50% of 60 minutes is 30,

10% of 60 minutes is 6,

75% of 60 minutes is 45.

Step-by-step explanation:

50 is half of 100 so 30 would be half of 60.

Bezzdna [24]3 years ago
4 0

Answer:

Step-by-step explanation:

50% = 0.5

10%=0.1

75%=0.75

1.

60*0.5=30min\\2.\\60*0.1=6min\\\\3.\\60*0.75=45min

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Answer:

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Step-by-step explanation:

Solution:-

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                          X ~ Norm ( μ , σ^2 )

                          X ~ Norm ( 40 , 4^2 ).

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                          P ( X > 50 )

- We will standardize our test value and compute the Z-score:

                          P ( Z > ( x - μ )  / σ )

Where, x : The test value

                          P (  Z > ( 50 - 40 )  / 4 )

                          P (  Z > 2.5 )

- Then use the Z-standardize tables for the following probability:

                          P ( Z < 2.5 ) = 0.0062

Therefore,          P ( X > 50 ) = 0.0062

- The probability that it rains in a certain region above 50 inches annually. is defined by:

                           q = 0.0062 ,

- The probability that it rains in a certain region rains below 50 inches annually. is defined by:

                           1 - q = 0.9938

                           n = 10 years   ..... Sample of n years taken

- The random variable "Y" follows binomial distribution for the number of years t it takes to rain over 50 inches.

                          Y ~ Bin ( 0.9938 , 0.0062 )

- The probability that it takes t = 10 years for it to rain:

                         =  10C10* ( 0.9938 )^10 * ( 0.0062 )^0

                         = ( 0.9938 )^10

                         = 0.93970

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