If the variance of the data values in a population is 225, what is the standard deviation of the data values?
a.15
b.17
c.11
d.13
(apex)

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Multiply. write your answer in simplest form. 3/8 x 5/7

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)