Papi Calot prepared his garden to plant potatoes. He planned to plant 7 rows of 18 plants each. But he still has a bit of room left, so he’s thinking about adding 15 additional potato plants. How many plants does Papi Calot have to buy? Give the rationale and then the answer.
Let's think step by step. Let’s first calculate the number of plants that Papi had planned: 7 rows * 18 plants / row = 126 plants. Now let’s add the other plants: 126 plants + 15 plants = 141 plants. So Papi has to buy 141 plants.. The answer is: 141.

Luke started working on a 1000-piece jigsaw puzzle. The first day he worked on it, he put together 10% of the pieces. On the second day, he put together another 20% of the remaining pieces from the first day. On the third day, he put together 30% of the remaining pieces from the previous day. How many pieces does he have left to complete after the third day? Give the rationale and then the answer.
Let's think step by step. Luke started putting together, 1000 x 0.1 = 100 pieces. The next day, there were 1000 - 100 = 900 pieces left. Then he put together 900 * 0.2 = 180 pieces on the second day. So there were 900 - 180 = 720 pieces left. On the third day, he put together 720 * 0.3 = 216 pieces. Therefore, Luke still has 720 - 216 = 504 pieces left to complete the puzzle.. The answer is: 504.

Wayne wants to serve shrimp cocktail as an appetizer. He plans on 5 shrimp per guest and will have 40 guests. If the shrimp costs $17.00 per pound and each pound has 20 shrimp, how much will he spend on the appetizer? Give the rationale and then the answer.
Let's think step by step. He wants to serve 5 shrimp per guest and will have 40 guests so he needs 5 * 40 = 200 shrimp. Each pound of shrimp has 20 shrimp and he needs 200 shrimp so he needs 200 / 20 = 10 pounds of shrimp. The shrimp is $17.00 per pound and he needs 10 pounds so he will spend 17 * 10 = $170.00 on shrimp.. The answer is: 170.