Answer:
0.02275
Step-by-step explanation:
We have been given that the time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. We are asked to find the probability of completing the exam in one hour or less.
We know that 1 hour equals 60 minutes. First of all, we will find the z-score corresponding to 60 minutes.

z = z-score,
x = Sample score,
= Mean,
= Standard deviation.



Now, we will use normal distribution table to find area under z-score of
as:


Therefore, the probability of completing the exam in one hour or less is 0.02275.
Answer:
v 39 degree
z 47 degree
x 94 degree
sry don't know about w and y....
Answer:
- y= 7
- y= -3
- y= -4
- y= -8
Step-by-step explanation:
y= -5x+1
=-5.-1+1
=7
Now you can do this method
Answer:
150 ft
Step-by-step explanation:
triangle area formula= (b*h)/2
25 time 12 is 300. divide 300 by 2 and get 150.
Answer:
(-5/2,-4)
Step-by-step explanation: