Answer:
50.27
Step-by-step explanation:
I can't see how any of those formulas show exponential decay. (Did you type those correctly?)
The formula that will show the remaining amount correctly is:
ending amount = Bgng Amount / 2^n
where "n" is the number of haf-lives.
So, for example if half life = 4 hours and if we want to calculate the amount after 9 hours (that's 2.25 half-lives) then:
ending amount = Bgng Amount / 2^n
ending amount = 50 / (2^(9/4))
ending amount = 50 / 2^2.25
ending amount =
50 / <span><span><span>4.75682846
</span>
</span></span><span><span>ending amount =
</span>
10.5112 grams
</span>Looking at the graph, we see that's about right.
Answer:
(4x + 7) (4x - 7)
Step-by-step explanation:
16x^2 will be broken down to 4x and 4x since when you multiply them, it will equal 16x^2
Then -49 can be broken down to 7 & -7 since 7 x (-7) = -49
Answer:
8x-y+4=0
Step-by-step explanation:
because 8x-y+4=-4+4
Answer:
24
Step-by-step explanation:
= 49 because any number squared is positive.
Since b=2,
2(-4)= -8.
Then this is 49-8-17, which equals 24.