[dementia0787]

I am absolutely terrible at mathematics, and I have a final soon. A few worksheets were handed out on Monday as study guides, and so far these five problems have me puzzled.First problem:Find the sum of the first 5 terms of the geometric sequence.The second term is 3 and the third term is 3/7.Second problem:Find the sum of each infinite geometric series, if possible.16 + 8 + 4 + . . .Third problem:Find the sum of each infinite geometric series, if possible.81 - 27 + 9 - . . .Fourth problem:Write decimal in fraction form. Check the answer by performing a long division.0.18 with a bar over the 18 (infinity)Fifth problem:John has $20000 in a safe deposit box. Each year, he spends 12% of what is left in the box. How much will be in the box after 16 years? Please round the answer to the nearest cent.Any help would be much appreciated. Thanks!No more answers needed. Will be selecting the answer below as best answer. Thanks!