Answer:
The Standard Deviation is a measure of how spread out numbers are. You might like to read this simpler page on Standard Deviation first. But here we explain the formulas. The symbol for Standard Deviation is σ (the Greek letter sigma)
A = LW
A = (< = 33)
L = W + 8
W(W + 8) < = 33
W^2 + 8W < = 33
W^2 + 8W - 33 < = 0
(W + 11)(W - 3) < = 0
W + 11 < = 0
W < = -11 (extraneous solution)
W - 3 < = 0
W < = 3 <===
L < = W + 8
L < = 3 + 8
L < = 11 <===
Since Jessica has 40 cents, and one gum ball costs 8 cents, you need to divide 40/8 = 5. The answer is 5 gum balls
After each cut, by observing the graph, the remaining area is 80% of the previous area.
It is given that
Actual area = 100cm²
<h3>What is the percentage?</h3>
The percentage is the value per hundred.
According to the graph,
Area after the first cut =80cm² (80% of the previous are)
Area after the second cut = 64 cm²(80% of 80)
Area after third cut = 51.2 cm²(80% of 64)
So we can observe that area after each cut is 80% of the previous area.
Therefore, after each cut, the remaining area is 80% of the previous area.
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