Selena bought two pairs of sunglasses for $7.50 each and pairs of socks for $3.20 each find the expression that demonstrates the total amount that Selena paid

A(t)=728(1+0.04)^t how much money did aditya originally invest

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Given a binomial distribution variable with n=20 and p=0.60 find the following possibilities using the binomial table a) p(x < 13) b) p x > 15) c) p(x = 17) d) p(11 < x < 14) e) p(11 < x < 14)