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.
Answer:
c
Step-by-step explanation:
Consider the ratio of image to original, that is
scale factor = = = 4 → C
A real couch would probably be around 2 or 2.5 meters in length, depending on how many people it should fit and for what market it was made.
Your answer would be R=-5x-4+y
Answer:
A)
7.2 7 * ⇒ correct
8.5 8 9 ⇒ 9 is the correct answer
12.9 13 * ⇒ correct
3.4 3 * ⇒ correct
11.5 11 12 ⇒ 12 is the correct answer
9.5 9 10 ⇒ 10 is the correct answer
B)
When a decimal number is 5 or more, you must round up, e.g. 4.5 must be rounded up to 5. You round down when the number is 4 or less.