Answer:
Margin of error of 0.0485 hours.
Step-by-step explanation:
We have that to find our
level, that is the subtraction of 1 by the confidence interval divided by 2. So:

Now, we have to find z in the Ztable as such z has a pvalue of
.
That is z with a pvalue of
, so Z = 1.96.
Now, find the margin of error M as such

In which
is the standard deviation of the population and n is the size of the sample.
In this question:

The margin of error is of:



Margin of error of 0.0485 hours.
To do this, you cube each section. You cube the 11 and the c^4. 11^3=1331 and (c^4)^3=c^12 (You multiply the 2 exponents). So your answer is 1331c^12
The answer is that he has a 40% chance
10*100=1000
1000/25=40
Making it a 40% chance
Answer:
Scruffy is
inches longer than Fluffy.
Step-by-step explanation:
Length of Scruffy =
inches
Length of Fluffy =
inches
We have to calculate how much Scruffy is longer than Fluffy.
Difference of their lengths = 
= (10 - 8) + 
= 2 + 
= 2 + 
=
inches
Therefore, Scruffy is
inches longer than Fluffy.