Agrocery store receives a case containing the bottles of juice shown below

Can someone me and do the problem plz so i can understand it more better

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

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base