Answer:
en español por qué no entiendo tu pregunta porfa
Answer:
There will be 50 bacteria remaining after 28 minutes.
Step-by-step explanation:
The exponential decay equation is

N= Number of bacteria after t minutes.
= Initial number of bacteria when t=0.
r= Rate of decay per minute
t= time is in minute.
The sample begins with 500 bacteria and after 11 minutes there are 200 bacteria.
N=200
= 500
t=11 minutes
r=?



Taking ln both sides



To find the time when there will be 50 bacteria remaining, we plug N=50,
= 500 and
in exponential decay equation.


Taking ln both sides




minutes
There will be 50 bacteria remaining after 28 minutes.
(1 lb 6 oz) + (1 lb 4 oz) + (12 oz) = 2 lb 22 oz.
16 oz = 1 lb, so the quantity (1 lb - 16 oz) evaluates to zero. This lets us rewrite the sum as (2 lb + 22 oz) +(1 lb - 16oz) =
3 lb 6 oz
Number of students N, y years
N = 700 + 50y
N = 700 + 50 x 10 = 1200 (C)
Left not painted percentage = 100 - 60 = 40 %
Left = 40/100 x 45 = 18 (H)