For the following geometric sequence, find the explicit formula. {1, -3, 9, } an = -3 · an - 1 where a1 = 1 an = -3 · an - 1 where a1 = -1 an = -1 · (-3)n - 1 an = (-3)n - 1

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar