The number of the families that need to be surveyed will be 2663.
<h3>What is the margin of error?</h3>
Your results will deviate from the actual population value by how many percentage points, as indicated by the margin of error.
We have the following info:
ME = 50 margins of error desired
= 1000 the standard deviation for this case
The margin of error is given by this formula:
(a) 
And on this case, we have that ME =50 and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b) 
The critical value for the 99% of confidence interval now can be founded using the normal distribution. The significance is 
= 0.01. And for this case would be 
= 2.58, replacing into formula (b) we got:
So the answer for this case would be n=2663 rounded up to the nearest integer.
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Answer:
$35
Step-by-step explanation:
If Fred has 227 total and ends up with 17, do 227-17 to determine how much he spent. ($210). If he bought 6 books, then divide $210 by 6.
Hence, each book was $35
Answer:
m<W=106
Step-by-step explanation:
18+130=148
360-148=212
212/2=106
Answer:
the plans can go 560 miles per hour and in 10 hours it can travel 5600 miles
Step-by-step explanation:
1st divide miles over hour so you have to do 3360/6 and the solution you get for that equation is how far the plane can go in miles per hour 2nd for the second question you have to multiply your unit rate by the 10 hours so since our unit rate was 560 miles per hour you would multiply 360 and 10.
Answer: 6 m
Identify the given information.
w = 1500 J
f = 250 N
Choose which formula you should use. In this case, you are finding the distance.
d = w/f
Substitute and solve.
d = 1500 J/250 N
d = 6 m
