If K is the center of the circle, which line segment is the radius?

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m