Answer:
52 inches deeper.
Step-by-step explanation:
One way you can solve this is by using subtraction.
1 foot = 12 inches and we already have 20 inches dug. The hole needs to be 72 inches deep so we just subtract 72 by 20 to find out how much more digging they need to do. They need to dig another 52 inches.
Another way to solve this, is by using subtraction and fractions.
They need to dig 6 feet and we already have dug. Now you can subtract. They need to dig feet to reach the required depth.
Answer:
-56, -7, -1, 0, 9, 33, 78
You can't just come on here and ask somebody to do your work. You have to do it on your own. Find a way to contact your school or teachers about it until you're able to do it again. :)
There is a relationship between confidence interval and standard deviation:
Where
is the mean,
is standard deviation, and n is number of data points.
Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first:
When we do all the calculations we find that:
Now we can find confidence intervals:
We can see that as confidence interval increases so does the error margin. Z values accociated with each confidence intreval also get bigger as confidence interval increases.
Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
7/8 + 1/4 can be written as
7/8 + 2/8
making the answer 9/8 or 1 1/8