Answer:
a). 8100 bacteria
b). 519 bacteria
c). Infinite
Step-by-step explanation:
Population growth of a bacteria is given by the exponential function,
f(x) = 
Where f(x) = Population after time 't'
= Initial population
r = Growth rate
t = Duration after t hours
If "100 bacteria gets tripled every hour"
300 = 
3 = 1 + 
r = 100×(3 - 1)
r = 200
So the function is, f(x) = 
a). Population after 4 hours,
f(4) = 
= 8100 bacteria
b). Population after 90 minutes Or 1.5 hours
f(1.5) = 
= 519.61
≈ 519 bacteria
c). Population after 72 hours,
f(72) = 
= Infinite
#3
<span>The marketing firm is observing and measuring specific characteristics of the subjects, but is not attempting to modify the subjects.</span>
Answer:
28
Step-by-step explanation:
add 7 + 21
Answer:
look below
Step-by-step explanation:
70x + 490=1050
-490 -490\
70x= 560
divide both sides by 70
x = 8
8 passengers