Rewrite each of the following as an expression of x which does not involve any logs 1000^log(10)(x)

Rewrite the following without an exponent. (5/8)-1

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

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?