Answer:
Option C.
Step-by-step explanation:
For a given set of N elements:
{x₁, x₂, ..., xₙ}
The mean is given by:
And the variance is given by:
Then for our set:
{70, 80 ,75, 75, 80}
We have 5 elements, then N = 5
The first thing we need to find is the mean.
Then the variance will be:
The correct option is C, 14.
Answer:
The correct answer is "decrease, 1,280 feet".
Step-by-step explanation:
The given values are:
Rate or speed,
= 320 feet per hour
1 pm to 5 pm means,
t = 5 - 1
= 4 hours
Now,
The net change in distance will be:
⇒ 
⇒ 
Thus the above is the correct approach.
Domains is x values
Thus
Domains : -5 , 3 , , 4
Range is all y values
Range: 4 , -2, 4 , 3
So for this we're going to use this rule: a/b x c/d = ac/bd
simplify 1 x 1 to 1
simplify 4 x 4 to 16
4 x 1/16 to 4/16
simplify 4/16 to 1/4
simplify to 6/4
Lastly simplify
Answer: 3/2
*In decimal form it would be 1.5
