The manager of a night club in Boston stated that 80% of the customers are between the ages of 21 and 29 years. If the age of customers is normally distributed with a mean of 25 years, calculate its standard deviation. (You may find it useful to reference the z table. Round "z" value to 3 decimal places and final answer to 2 decimal places.) standard deviation:

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

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y

=

−

2

find the upper bound of the range.

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y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

if the angular bisector of an triangle bisects the opposite side, prove that the other two sides are equal.

the answer will be -6x^2 +46

step-by-step explanation: