answer these questions thank you

Question 13 [1 point} Determine the number of terms in the series i+++m that would result in a sum of 820. Your answer: * Question 19 [1 point} Determine the sum, to the nearest tenth, of the first 15 terms of a geometric series, given that the third term is 198 and the common ratio is -0.6. Your Answer: Answer Question 20 [1 point} Each week, a puppy eats 3.??% more food than it did the previous week. In the first week, the puppy ate 0.? kg of food. Determine the total amount of food the puppy eat over a 8-week period {to the nearest tenth of a kilogram}. (Enter a numeric value only. Do not include units). Your Answer: Answer Question 11 [1 point} If the sum of the first 10 terms of an arithmetic series is 2590, and the common difference is a then the value of the first term is Your Answer: Answer Question 12 [1 point} The number of cans arranged in layers form an arithmetic sequence. There are ?4 cans in the bottom layer and 2 cans in the top layer. There are 1? layers. HOW many cans are in the display? (Enter a numerical value only.} Your answer: _'v