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Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2