While a federal system places most government power in the hands of the national government, by contrast a confederal system is best described as what?

places more power in constituent states

Explanation:

The constituent states or other administrative regions in a confederal system have a greater degree of sovereignty and government control than in a federal system.

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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