PLEASE Help!! The First person to answer these two questions and the ones I asked seconds ago will get brainiac. This one is worth double points!
Theses are 18 and 19
NOTE: In my first question I accidentally said they are questions 19 and 20.

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

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