A group of hawks is called a kettle. It is breeding season for hawks. A group of ornithologists are tracking 6 kettles of hawks. Each kettle has an average of 15 pregnancies that yield 4 babies per batch. How many babies are expected this season if approximately 25% are lost? Give the rationale and then the answer.
Let's think step by step. Each kettle has 15 hawks that get pregnant and each one yields 4 babies per pregnancy so there are 15 * 4 = 60 babies expected per kettle. If 60 baby hawks are expected per kettle and the ornithologists are tracking 6 kettles total then there are 60 * 6 = 360 baby hawks expected across all six kettles this breeding season. If there 25% of eggs do not hatch, then we are looking for 25 (percent that do not make it) / 100 (total number of babies expected) = .25 (percentage converted to decimal form for the proportion of expected baby hawks to be lost). The total number of baby hawks expected equals 360 * .25 expected los s = 90 babies not expected to hatch (lost). There are 360 total number of baby hawks expected and there are 90 babies expected to be lost so 360 - 90 = 270 remaining baby hawks expected this breeding season.. The answer is: 270.

At a party, there are 50 people. 30% of them are boys. How many girls are at this party? Give the rationale and then the answer.
Let's think step by step. There are 50 * 30 / 100 = 15 boys at that party. That means there are 50 - 15 = 35 girls.. The answer is: 35.

Brad’s zip code consists of five numbers that add up to 10. The first and second numbers are the same. The third number is zero. The fourth number is double the first number. The fourth and fifth numbers add up to 8. What is Brad’s zip code? Give the rationale and then the answer.
Let's think step by step. The five numbers add up to 10, so the first three numbers add up to 10 - 8 = 2. The third number is 0, so the first two numbers add up to 2 - 0 = 2. The first and second numbers are equal, so they are both 2 / 2 = 1. The fourth number is double the first number, so it is 2 * 1 = 2. The fifth number is 8 - 2 = 6. Thus, Brad’s zip code is 11026.. The answer is: 11026.