Initially, a store has 35 train sets. the store sells 3 train sets each month. what is the explicit rule for the number of train sets the store has after ‘n’ months?

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

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