Brainliest and 5 stars to correct answer

The first and third selections are infinite sums. The given sum is finite, so those choices are incorrect.

The second choice fails to give the correct value for n=0. (It gives 0, not -3.)

Thus, all choices are eliminated except the last one. It gives the summation of the correct terms for the correct number of terms.

The 4th selection is correct:

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o