Answer:
r=-6
r=-1
Step-by-step explanation:

Answer: 76 points.
Step-by-step explanation: Since the team is making 38 points in 30 minutes, and there are 60 minutes in an hour, all we need to to is double the amount of points made in 30 minutes, (38 x 2), which results in 76 points.
Answer:
The sample must be of at least 48 pizzas.
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
.
So it is z with a pvalue of
, so 
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.
How large a sample must she take if she wants the margin of error to be under 0.5 inch?
She needs a sample of at least n, in which is found when 






Rounding up
The sample must be of at least 48 pizzas.
Noah is correct because the two sides are equivalent expretions