Answer:
where is the rest of the question?
Step-by-step explanation:
First step
12 x 1.3
Second step
15.6 x 7.5
The answer is 117 :)
Answer:
New coordinates for A - (2, -5)
New coordinates for B - (5, -3)
Step-by-step explanation:
When translating a point to the 7 units right, you must add 7 to the x coordinate. When translating a point 8 units down you must subtract 8 from the y coordinate.
Sarah spent $1,083 because $57*38=$2,166 and $2,166/2=$1083
Answer:
And rounded up we have that n=421
Step-by-step explanation:
We know that the sample proportion have the following distribution:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 90% of confidence, our significance level would be given by
and
. And the critical value would be given by:
The margin of error for the proportion interval is given by this formula:
(a)
And on this case we have that
and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
We assume that a prior estimation for p would be
since we don't have any other info provided. And replacing into equation (b) the values from part a we got:
And rounded up we have that n=421