When we mentally multiply 15 by 10 we can simply attach 0 to 15 to make the product 150 when we multiply 1.5 by 10 why can't we attach zero to make the product 1.50

Whats the name of the vertical axis

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

If there are 3.281 feet in 1 meter, how many inches are in one centimeter