Answer: 5x^2 - 5x - 6
work:
5x^2 -3(x+2) - 2x
distribute
5x^2 -3x - 6 - 2x
combine like terms
5x^2 -5x - 6
Answer:
0.22
Step-by-step explanation:
after 6.2 hours the dose will decay to 70% in your bloodstream.
<h3>How long you must wait for the dosage to decay to 70% in your bloodstream?</h3>
We know that the half-life is 12 hours. Then the exponential relation for an initial dosage of A is:

If the dosage needs to decay to a 70% of the initial dosage, then we must have:

Now we need to solve that for t:
If we apply the natural logarithm in both sides, we get:

So after 6.2 hours the dose will decay to 70% in your bloodstream.
If you want to learn more about half-life:
brainly.com/question/11152793
#SPJ1
Answer:
<em>B-2/3</em>
There are 48 total marbles and 32 are not white, so if you reduce, you get 2/3