URGENT!!! A recent survey found out that 52% of girls 14-17 years old wear contacts. We take a random sample of 20 girls 14-17 years old. a) Is this a binomial distribution? why or why not?
b) Find the probability that exactly 15 girls in our sample of 20 are wearing contacts.
c) Find the probability that at least 10 girls are wearing contacts

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

yes

step-by-step explanation:

yes

step-by-step explanation:

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thus, the first answer choice, y = sec x, is the correct one