Identify the Prime numbers: 11, 21, 31, 41, 51, 61, 71, 81, 91

Aregression was run to determine if there is a relationship between hours of tv watched per day (x) and number of situps a person can do (y). the results of the regression were: y=ax+b a=-0.662 b=30.418 r2=0.703921 r=-0.839

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?