Question 630465
For now, say the cost of the coin = {{{a}}}
After 1 year it's worth
{{{ a + .0325a }}}
{{{ a*( 1 + .0325 ) }}}
After 2 years
{{{ a + .0325a + .0325( a + .0325a ) }}}
{{{ a*( 1 + .0325 ) + .0325a*( 1 + .0325 ) }}}
{{{ ( 1 + .0325 )*( a + .0325a ) }}}
{{{ a*( 1 + .0325 )^2 }}}
After 15 years:
{{{ a*( 1 + .0325 )^15 }}}
The coin cost $25, so it's worth
{{{ 25*( 1.0325 )^15 }}}
You can do this with calculator