Suppose that IQ scores have a bell-shaped distribution with a mean of 103 and a standard deviation of 13. Describe where the highest and lowest 5 % of IQ scores lie.

Consider the line y = -3/-2 x +6. find the equation of the line that is perpendicular to this line and passes through the point (-9,-3). find the equation of the line that is parallel to this line and passes through the point (-9,-3).

Last saturday, the museum box office sold 281 tickets for a total of $3,954. adults ticket cost $15, and students ticket cost $12. how many of each kind of tickets were sold?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?