9hours
A dose of 15mb M. Amphet Salts will last varying amounts of time depending on who is receiving the dose. The dose will last longer in a smaller person than in a larger person.
it will last a long as you take care of it
Around 72 hours since your last dose. Even if it's the only dose.
It depends how long you care for it and how you care for it because it can vary as to how long a plant lives or dies.
Is there a oil over the cover I can buy to help me
Yes it can it is very hard but if you leave it outside for too long during the summer like my kids did last year it will dry
they last for many years if taken care of.
5 hours
Depends on how well you take care of it cars can last for years if well take care of.
If you taking care of the GPS, It will last about 5 years
Alfalfa is a perennial and can last many years if you take care of it.