Answer:
The correct option is (C).
Step-by-step explanation:
Let <em>X</em> = heights for adult men in a certain population.
The random variable <em>X</em> follows a Normal distribution with mean <em>μ</em> = 70 inches and standard deviation, <em>σ</em> = 4 inches.
Compute the heights that represents the middle 80 percent of the heights as follows:
The value of <em>z</em> for the probability P (Z < <em>z</em>) = 0.90 is,
<em>z</em> = 1.282
*Use a <em>z</em>-table.
Compute the two heights as follows:
Thus, the two heights which represents the middle 80 percent of the heights are 64.87 inches and 75.13 inches.
The correct option is (C).
N x 4 = 9- 2n
If you are trying to make this into a number equation, this is how you do it or you can write it as 4n=9-2n
Answer:
i hope tht its correct
Step-by-step explanation:
0.3, -1.2
Total number of sides = n
Half, means n/2 of them have 150° each.
Half, means n/2 of them have 170° each.
Sum of angles in a polygon is given by the formula: (n -2)*180.
So summing the first of 150 degrees and the other half of 170 would be equal to the total of (n -2)*180.
(n/2)*150 + (n/2)*170 = (n -2)*180
(n/2)*(150 + 170) = (n -2)*180
(n/2)*(320) = (n -2)*180
160n = 180n - 360
160n - 180n = -360
-20n = -360
n = (-360) / (-20). Divide out
n = 18
So the polygon has 18 sides.
I hope this helps.
Regards.
Answer:
4a
Step-by-step explanation:
