The demand function for a certain brand of cd is given byp = −0.01x2 − 0.2x + 9where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. determine the consumers' surplus if the market price is set at $6/disc. (round your answer to two decimal places.)

cosine

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

step-by-step explanation:

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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