Which of the following about a normal distribution is true? Question 23 options:

The area under the normal curve depends on the value of σ

The value of σ must always be positive.

The value of µ must always be positive.

The shape of the normal distribution depends on the value of µ.

The possible values of a standard normal variable range from -3.3 to +3.3

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

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step-by-step explanatio89

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet