Which of the following cannot be used to state a postulate?
A:defined terms
B:theorems
C:undefined terms
D:definitions

Anyone know? will mark brainliest if you're correct!

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

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