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telo118 [61]
3 years ago
13

Acme elementary school likes to keep the student to teacher ratio at 20 students for every teacher. if there are 213 students in

the school, how many teachers must they hire to keep this ratio
Mathematics
2 answers:
Elanso [62]3 years ago
8 0
11 teachers. plz 5 star


katrin2010 [14]3 years ago
8 0
213÷ 20= 10.65 
to round it up  they would hire 11 teachers for every 20 students with a total of 213 students.
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when two chords intersect, four line segments are created. what relationship exists between the lengths of those line segments?
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Explanation:

The product of the lengths of the segments of one chord is equal to the product of the lengths of the segments of the other chord. (The lengths are measured from the point of intersection of the chords to the points of intersection of the chord with the circle.)

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<em>Additional comment</em>

This relationship can be generalized to include the situation where the point of intersection of the lines is <em>outside</em> the circle. In that geometry, the lines are called secants, and the segment measures of interest are the measures from their point of intersection to the near and far intersection points with the circle. Again, the product of the segment lengths is the same for each secant.

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We need at least 601 incomes.

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Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

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We have to find n, for which M = 500, \sigma = 6250. So

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Rounding up

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