What is the gcf of 30,48,60

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

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