Answer:
D) 2
Step-by-step explanation:
Answer:
a.1.90 years
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.
In this question:

So

So the correct answer is:
a.1.90 years
Answer:
2592 cm
Step-by-step explanation:
square area = x²
rectangle area = bh
so
x² = bh
since the areas are equal
b and h are in the problem as 64 and 81
x² = 64x81
x² = 5184
divide by 2
x = 2592 cm
It snowed
foot more yesterday than today
<em><u>Solution:</u></em>
Given that, At the Butler Ski Resort, it snowed 1/2 of a foot yesterday and 1/5 of a foot today
From given information,

<em><u>To find: how much more did it snow yesterday than today</u></em>
So we have to find the difference between snowed yesterday and today

Hence it snowed
foot more yesterday than today
It means that the equations answers are
odd (numbers 1,3,5 ,7,9)
even numbers (2,4,6,8,10)
or neither (0 or infinity)