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).
Answer:
-20 - (-20) = 0
Step-by-step explanation:
Since the problem starts with a negative number, you need to find out how many units from 0 it is. Since it is 20 units away from 0 in the negative direction, you need to add 20 in the positive direction to make it 0. Subtracting a negative number makes it positive. 2 negatives make a positive, so the problem is stated (rearranged) : 20 - 20 = 0.
Answer:
Chandler
Step-by-step explanation:
(12 + 3 * 6) -5
( 12 + 18) -5
30 -5
25
Answer:
5:2
Step-by-step explanation:
Ratios are similar to fraction. So, this could be written as 10/4. Although, it has to be reduced.
So it would be 5/2.
Another thing to keep in mind for this question is that order matters. The pendants are listed first, so its number has to be listed first, while the number of bracelets must be listed second.
In conclusion, and to put it into a ratio form, the answer is:
5:2
