Answer:
I’m not sure really but the first one is 103 or 110
Step-by-step explanation:
Answer:
Cancel the credit card
Step-by-step explanation:
If you don't have the card, it can't be charged to you
Answer:
AB = 8.39 inches
AC = 13.1 inches
(corrected to 3 significant figures.)
Step-by-step explanation:
In a right triangle, AB is the opposite side; BC is the adjacent side, and AC is the hypotenuse side.
since tanθ = opposite / adjacent,
we can use this to find side AB.
tan40° = AB / 10
AB = 8.39 in. (corrected to 3 significant figures.)
since cosθ = adjacent / hypotenuse
we can use this to find AC.
cos40° = 10 / AC
AC = 13.1 in. (corrected to 3 significant figures.)
The answer is (x+4) because you combine the like terms
Answer:
3 grams will be left after 6 half-lives
Step-by-step explanation:
Half-live:
Time it takes for the substance to be reduced by hall.
After n half lives:
The amount remaing is:
![A(n) = A(0)(0.5)^{n}](https://tex.z-dn.net/?f=A%28n%29%20%3D%20A%280%29%280.5%29%5E%7Bn%7D)
In which A(0) is the initial amount and n is the number of half-lives.
Starting with 210 grams of a radioactive isotope, how much will be left after 6 half-lives?
This is A(6) when A(0) = 210. So
![A(n) = A(0)(0.5)^{n}](https://tex.z-dn.net/?f=A%28n%29%20%3D%20A%280%29%280.5%29%5E%7Bn%7D)
![A(6) = 210(0.5)^{6} = 3.3](https://tex.z-dn.net/?f=A%286%29%20%3D%20210%280.5%29%5E%7B6%7D%20%3D%203.3)
Rounding to the nearest gram
3 grams will be left after 6 half-lives