Def AC BD with an explanation
Welllll i don’t really know I just need points so I hope you get a correct answerrrr!!!
Answer:
Width = 15.
Length = 22.
Step-by-step explanation:
If the length is L then the width W = 1/2L + 4.
The perimeter = 2L + 2W, so
2L + 2(1/2L + 4) = 74
2L + L + 8 = 74
3L = 66
L = 22.
So W = 1/2 *22 + 4 = 11 + 4
= 15.
Answer:
can you get into more detail?
Step-by-step explanation:
Can u tell me what kind of inequality it is? Like exponential? Or something like that?
Answer:
0.002 mg of sample will be left after 40 days.
Step-by-step explanation:
Half life of the iodine-131 =
= 8 days
Initial amount of iodine-131 =
= 64 milligrams = 0.064 g
Amount of iodine-131 left after the time of 40 days = N
Decay constant =
= ?
![\log[N]=\log[N_o]-\frac{\lambda \times t}{2.303}](https://tex.z-dn.net/?f=%5Clog%5BN%5D%3D%5Clog%5BN_o%5D-%5Cfrac%7B%5Clambda%20%5Ctimes%20t%7D%7B2.303%7D)
![\log[N]=\log[0.064 g]-\frac{0.0866 day^{-1}\times 40 days}{2.303}](https://tex.z-dn.net/?f=%5Clog%5BN%5D%3D%5Clog%5B0.064%20g%5D-%5Cfrac%7B0.0866%20day%5E%7B-1%7D%5Ctimes%2040%20days%7D%7B2.303%7D)
![N=Antilog [-2.6979 g]](https://tex.z-dn.net/?f=N%3DAntilog%20%5B-2.6979%20g%5D%20)
N = 0.002004 g = 0.002 mg
0.002 mg of sample will be left after 40 days.
