Answer:
7 + 3 = 10
21 - 19 = 2
Step-by-step explanation:
The length of of each edge is 5 ft.
If the edge of the cube is marked as a, the the volume can be calculated as V = a³, so here given the
![a= \sqrt[3]{V} = \sqrt[3]{125}=5](https://tex.z-dn.net/?f=a%3D%20%5Csqrt%5B3%5D%7BV%7D%20%3D%20%5Csqrt%5B3%5D%7B125%7D%3D5)
volume V, we car write that:
Answer:
c) .22
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:

Then



Answer:
w=51
x=90
y=38
Step-by-step explanation:
got the angles. I'm not so sure about the lengths of the triangle....
Answer:

Step-by-step explanation:
Look at the picture.
ΔABC and ΔDBA are similar (AA). Therefore the sides are in proportion:

We have

Substitute:
<em>cross multiply</em>
