You just invested $$49,000$ that you received as an insurance settlement.

a$.$ How much will this account be worth in $40$ years if you earn an average return of $7\mathrm{.}0$ percent? $($Assume annual compounding.$)(10\%)$

b$.$ How much more will this account be worth in $40$ years if you earn an average return of $7\mathrm{.}6$ percent rather than $7\mathrm{.}0$ percent? $($Assume annual compounding.$)(10\%)$