We have equation:
t=20x+31
x is number of years after 1997.
To calculate number of laptops in 2005:
x=2005-1997
x=8
t=20*8+31
t=160+31
t=191
In year 2005 school had 191 laptops.
For this problem plug in the given x and y values:
For the first one: No
second one: No
third one: Yes
fourth one: No
Answer:
I think C but then again I could be wrong.
Answer:
The planning value for the population standard deviation is of 4330.
Step-by-step explanation:
Uniform probability distribution:
The uniform probability distribution has two bounds, a and b. The standard deviation is given by:

Annual starting salaries for college graduates with degrees in business administration are generally expected to be between 20000 and 35000.
Uniform in this interval, so 
What is the planning value for the population standard deviation?

The planning value for the population standard deviation is of 4330.
0.0135135135135135135135135 etc