Ack'hem do you know who this is?

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

43lbs of tomatos cost $387. how much would 41lbs cost

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt