What is the value of expression?
6^-7*6^4
a. 6^-3
b. 6^-11
c. 6^-28
d. 6^11

Estimate the distance between orlando and jacksonville

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

Can someone me with this problem i don't understand i need