Consider the polynomial function (2) = 3x7 +505 - 8x4 - 12x2. What is the end behavior of the graph of q?
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As 2 + 0,9(2) ► 00, and as 2 →-0,9(2) ► O.
As x + 0,9(2) -00, and as x → -00, 9(2) ► 0.
С
As 2 → 00, 9(a) → -00, and as x → -00, 9(2) +-0.
As x → 00, 9(2) ► 00, and as 2 → -00, 9(2) — -0.

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b) 62.47% of the students are between 14 and 18 years old.

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mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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