Answer: the plain pencil costs 10 cents and the colored pencil costs 20 cents
The starting value is 20,300, and the value is decreasing by 9.5% each year.
Because it decreases by 9.5% each year based on the previous amount, we use an exponential decay model.
A decrease by 9.5% corresponds to multiplying by 91.5% each year.
We write . We plug in 11 years for t.
$7,671.18
I do not understand what to do , more explicitly sorry :(
The fraction form is 26/3 or 8 2/3