Chromium 51 is a radioactive substance used in medicine.
It has a 1/2 life of 28 days.
The equation for its exponential decay model is
28
y=a(.5)
If 10 mg is ingested by a patient, how many days
before only 8 mg is still emitting radiation?
Solve. 8 = 10(.5)
fort.
Use the base change formula to solve your logarithm.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?