What is the greatest common factor of 12 and 36? (1 point) 2 4 6 12

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

How to do this , and can some one explain

Iwill give ! if m∠a=59 and m∠3=81°, what is m∠b? m∠b= _[blank]_°