If $$P$$ dollars are invested for one year, at a rate of interest $$i$$, it will accumulate to amount $$A$$ at the end of the year by the following equation:
$$!A=P(1+i)$$
How long does it take in years $$t$$ to double your principal $$P$$ with an interest rate of $$i$$ per annum?
$$!2P=P(1+i)^t$$
$$!2=(1+i)^t$$
$$!\log_e 2=t\log_e(1+i)$$
$$!t=\frac{\log_e 2}{\log_e(1+i)}\approx \frac{0.7}{i}$$
You can buy Viagra in the nearest drugstore if you have a prescription from your doctor. It means, your awkward health disorder becomes public inevitably. Do not be frustrated! Fortunately, you can avoid any publicity at all if you choose to buy Viagra online. Our reliable online pharmacy will offer you top-quality pills from the manufacturer at the best price.
Attention! viagra online pharmacy Do not fail to see your doctor before ordering Viagra online! Use the lowest dose of the drug that works. Never overdose your ‘love pills’ – take only 1 pill about 1 hour before intended intercourse. Never take Viagra repeatedly within 24 hours!