In a lab experiment, 2400 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double Every 19 hours. How long will it be, to the nearest 10th of an hour, until there are 3300 bacteria present?

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Which function has the domain x> -11

Y= a(x-3)squared-1 what is the value of a