Answer:
Step-by-step explanation:
Answer:
A product of factors is zero if and only if one or more of the factors is zero. That is, if ab = 0, then either a = 0 or b = 0 (or both).
Hence (x+3)(x+12) = 0 only if (x+3) = 0 or (x+12) = 0 or both. (x+3) = 0 when x = 3.(x+12) = 0 when x = 12.
Hence the values of x that make (x+3)(x+12) = 0 are x = 3 and x = 12.
Answer:
Step-by-step explanation:
Given that a common inhabitant of human intestines is the bacterium Escherichia coli.
A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes.
Initial population = 71 cells
Doubles in 1/3 of an hour
, where t is the no of hours.

Rate of growth = derivative of P
= 