Y2-y1/x2-x1
5-(-3)/(-6-(-1))
8/-5
-8/5 is the slope
Answer: 
Step-by-step explanation:
We can make the conversion from milimeters to meters (Remember that 
). Then:
to 
:
to :
Now, we need to use this formula for calculate the area of a rectangle:
Where "l" is the lenght and "w" is the width.
Knowing that:
We can substitute values into the formula. Then we get:
First, find the z-score:
z = (value - mean) / sdev
= (275 - 280) / 15
= - 0.33
In order to use a standard normal table, we need a positive z-score:
P(z < -0.33) = 1 - P(z < 0.33)
Looking at the table, we find P(z < 0.33) = 0.6293
Therefore:
P(z < -0.33) = 1 - 0.6293 = 0.3707
Hence, you have a probability of about 37% <span>that a randomly selected pregnancy lasts less than 275 days.</span>
Answer:
4) D
200+180+360= 740
20) C
21) B
55*2+75*2
Step-by-step explanation:
