Answer:
Step-by-step explanation:
Since it is a right-angled triangle, it has base, perpendicular and hypotenuse.
Base = r
Perpendicular = 14
Hypotenuse = r + 7
<u>Using Pythagoras theorem:</u>
Put the values
(r + 7)² = (r)² + (14)²
Using formula a² + 2ab + b² = (a + b)²
r² + 14r + 49 = r² + 196
<em>Subtract</em> r² to both sides
14r + 49 = 196
<em>Subtract</em> 49 to both sides
14r = 196 - 49
14r = 147
<em>Divide</em> 14 to both sides
r = 147 / 14
r = 10.5
6 donuts. He repacked 6 donuts into each box .
Mr. Terence had 18 boxes containing 36 donuts each, that means:
Total donuts = n° boxes*n° donuts
Total donuts = 18*36 = 648
He had in total 648 donuts.
He sold 162 donuts and repacked the rest into 81 boxes. Then:
Rest donuts = Total donuts - sold donuts
Rest donuts = 648 - 162 = 486
The rest donuts are 486 donuts.
He repacked the rest into 81 boxes, then:
n° donuts (each box) = Rest donuts/n° boxes
n° donuts (each box) = 486/81 = 6
The number of donuts that he put in each box is 6 donuts.
Answer: Margin of error = 1932
Step-by-step explanation: <u>Margin</u> <u>of</u> <u>Error</u> is the amount of variation a survey's results have. In other words, it is understood as the measure of variation one can see if the same survey was taken multiple times.
Margin of error is calculated as
z is z-score related to the percentage of confidence, in this z = 2.576
σ is population standard deviation
n is how many individuals are there in the sample or population
With a new level of confidence of 99%:
ME =
ME = 2.576(750)
ME = 1932
The new margin of error would be 1932.
6.8 is what i got for the answer
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