Considering a standard normal distribution answer the following questions: A. A researcher grouped his data to include from two standard deviations (SD) below the median to one SD above the mean. Approximately what percentage of the total data was selected? B. What is the approximate percentage of a selected group that is above the 50 percentile and within two standard deviations of the mean?

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.