Which expression must be an odd number if x is an odd integer?
A) 3x
B) 2x
C) x + 5
D) x2 + 1

What is the correlation coefficient for the data? don't forget to turn the diagnoisticon (in the catalog menu of the calculator). r = answer (round to the nearest thousandth)

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Aculture started with 3000 bacteria. after 5 hours it grew to 3900 bacteria. predict how many bacteria will be present after 9 hours