Math homework please help me with these. I don't understand it at all.

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

41/17 as a decimal rounded to the nearest hundredth

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?