If 3*10^4/8*10^-2 = 3.75*10^n , what is the value of n?

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 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

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4