Answer: 
Step-by-step explanation:
We have the following function:

And we have to evaluate it when
, this means we have to substitute
by
:

Solving:

Finally:

1 1/2 or 3/2 because there is 4 more than 8 which is a half.
Answer:
Step-by-step explanation:
Rewrite this expression as (27^(1/3) )². this is equivalent to:
( ∛27 )² or (∛27)(∛27).
If you wish to evaluate this expression, it is ( 3 )( 3 ) = 9.
Considering the situation described, we have that:
- The appropriate null hypotheses is
.
- The appropriate alternative hypotheses is
.
<h3>What are the hypotheses tested?</h3>
At the null hypotheses, it is tested if the mean has not been reduced, that is, it still is of 5.2 hours, hence:
.
At the alternative hypothesis, it is tested if the mean has been reduced, that is, it is now of less than 5.2 hours, hence:

More can be learned about hypotheses tests at brainly.com/question/26454209