What was the principal difference between rené descartes' method for finding the truth and francis bacon's?

Descartes' method was rationalism, working deductively from principles inside the mind.

Bacon's method was empiricism, working inductively from the evidence of experience.

Explanation:

the amount of the purse is, $120.

tax rate =9%

first find the the total tax she paid on the amount is equal to the 9% of $120 i.e,

now,

total amount paid by shalika = $120 +$10.8 = $130.8