Answer:
90 deg
Step-by-step explanation:
Recall that for a rhombus, the diagonals always intersect at right angles.
Hence angle PXM is 90 deg
To answer (a), we will need to find the Z value for 710 hours and 990 hours.


B) 68% of data lies between one standard deviation of the mean.
850 +70 = 920
850 - 70 = 780
Check the picture below.
make sure your calculator is in Degree mode.
Answer:
96.5606
Step-by-step explanation:
I hope this helps :)
We have that
using a graph tool
see the attached figure
the answer is the first option
y<=3x
y>-2x-1