Question 1179221


Under plan A, he will increase his account balance by ${{{20}}} a year. 

${{{100 +20*t}}}
after {{{10 }}}years
${{{100 +20*10=300}}}

Under plan B, he will increase his account balance by {{{15}}}% each year. 

account balance is {{{100}}}% plus increase  by {{{15}}}%={{{115}}}% or {{{1.15}}}

{{{100 * (1.15)^10=404.56}}}

difference between plan A and B

{{{404.56-300=104.56}}}

 he will save {{{104.56 }}}more with Plan B after {{{10}}} years