<span>Let the equation be : at^2 + bt + c = P,
where t = time (hrs),
P = population (1000's).
When t = 1, P = 3.03.
When t = 2, P = 1.72.
When t = 3, P = 1.17.
Substitute these into the equation to obtain these 3 simultaneous equations :
a + b + c = 3.03
4a + 2b + c = 1.72
9a + 3b = c = 1.17
Solving gives :
a = 0.38,
b = -2.45,
c = 5.1.
The equation is therefore,
P = 0.38t^2 - 2.45t + 5.1
Testing with t = 0 to 6 gives the population values as provided,
so it seems to be a valid model.
At t = 9 hrs,
P = 0.38*9^2 - 2.45*9 + 5.1
= 13.83.</span>
the answer is 21<span>% oxygen, </span>
Aves-
-lay eggs (oviparous)
-hollow/ porous hones
-have feathers
Mammalia:
-give birth to young ones.
-denser bones
-have hair or fur
So in the nuclues happens transaction where dna forms rna, or tRNA and then it moves out of the cell to a ribosome
Well, there is red bone marrow and yellow bone marrow. Red consists mostly of hemopoietic stem cells which produce red blood cells. Yellow bone marrow is yellow due to the high quantity of fat. As you age, yellow bone marrow becomes more prominent.