A Store-It-All storage facility requires users to enter a four digit code, using numbers 0-9, to get through the gate. You need
to get a box of winter clothes from your storage container, but you forgot the code. How many possible codes are there if th digits cannot be repeated ?
What is the probability that you will guess the correct code on your first try ?
If the digits can be repeated , how many possible codes are there ?
Using the formula ending amount is 1649=a p=initial amount=100 t=10 r=r
so 1649=100e^{10r} divide both sides by 100 16.49=e^{10r} take ln of both sides ln(16.49)=10r divide both sides by 10 (ln(16.49))/10=r use calculator 0.28027=r about 28% interest
