 to be the amount that remains undecayed after a given period of time $t$, you can say that you have

${A}_{t} = {A}_{0} \cdot {\left(\frac{1}{2}\right)}^{n}$

Here

• $n$ is the number of half-lives that pass in the given period of time $t$

In your case, you know that it takes $30$ minutes to transport the sample of polonium-238, which implies that you have

$n = \left(30 \textcolor{red}{\cancel{\textcolor{b l a c k}{\text{minutes"))))/(3color(red)(cancel(color(black)("minutes}}}}\right) = 10$

So if $10$ half-lives pass in $30$ minutes and you know that you must end up with $\text{0.10 g}$ of polonium-238, you can say that you have

$\text{0.10 g} = {A}_{0} \cdot {\left(\frac{1}{2}\right)}^{10}$

Rearrange to solve for ${A}_{0}$

${A}_{0} = \text{0.10 g" * 2^10 = "102.4 g}$

Now, I'll leave the answer rounded to two sig figs, but you could round it to one significant figure based on the value you have for the half-life of the isotope.

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I’ll never forget him.Love your pics :-) I love seeing people's doggie pics! I got new glasses also, trying to get used to them. Yours are super cute. Found ya on A Mile In Her Boots. Looking forward to following you.
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My new glasses are making me a bit dizzy too, hopefully we'll get used to them soon!require 'hdf5'
require 'torch'
require 'nn'
require 'nngraph'
require 'cunn'
require 'cutorch'
nngraph.setDebug(false)
-- load custom modules
require 'load'
require 'Sampler'
require 'image'
-- load init data
f = hdf5.open('animate/ghost.h5', 'r')
init = f:read("init"):all():double():cuda()
-- cvae
sampler = nn.Sampler():cuda()
saved = torch.load('save/ghost_CVAE_z1.t7')
model = saved.model
prior = saved.prior
encoder = saved.encoder
decoder = saved.decoder
-- mlp
saved = torch.load('save/ghost_MLP.t7')
mlp = saved.model
-- setup
x_input = torch.Tensor(8192):cuda()
x_input[{{1,4096}}] = init[1]
x_input[{{4097,8192}}] = init[2]
N = 2000
win = nil
-- for i = 1,N do
--    pmu, plogv = unpack(prior:forward(x_input))
--    code = sampler:forward({pmu, plogv})
--    recon = decoder:forward({x_input, code})
--    x_input[{{1,4096}}] = x_input[{{4097,8192}}]
--    x_input[{{4097,8192}}] = recon
--    win = image.display({image=recon:reshape(64,64), win=win, zoom=4})
-- end
for i = 1,N do
   recon = mlp:forward(x_input)
   x_input[{{1,4096}}] = x_input[{{4097,8192}}]
   x_input[{{4097,8192}}] = recon
   win = image.display({image=recon:reshape(64,64), win=win, zoom=4})
end
That's just a bad take. Arsenal has a local community with regular stadium going fans, same for Manchester United. I am not stupid, I understand that there are'remote' fans who support big teams, but they still have a core set of fans who are part of the local stadium going community. 

I am not saying that fans who don't live there are not real fans or that the club cannot be bigger than a smaller community but I do think that fans in this local community most likely don't care who is the owner.

Also most local London teams have a strong local community I have 2 friends who support Borehamwood and Barnet. My uncle had an Arsenal season ticket for 20 years and also had a community there.Braid of the Day #1706
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