It takes Nissa 10 seconds to clip each of her cats' nails. 90 seconds to clean each of her ears, and 5 minutes to shampoo her. If the cat has four claws on each foot, how many seconds does grooming her cat take total? Give the rationale and then the answer.
Let's think step by step. First find the total number of claws the cat has: 4 claws / foot * 4 feet = 16 claws. Then find the total time Nissa spends cutting the claws: 16 claws * 10 seconds / claw = 160 seconds. Then find the total time she spends cleaning the cats' ears: 90 seconds / ear * 2 ears = 180 seconds. Then find how long the shampooing takes in seconds: 5 minutes * 60 seconds / minute = 300 seconds. Then add the time she spends on each task to find the total time she spends grooming the cat: 160 seconds + 180 seconds + 300 seconds = 640 seconds.. The answer is: 640.

Mark collects money for the homeless. He visits 20 households a day for 5 days and half of those households give him a pair of 20s. How much did he collect? Give the rationale and then the answer.
Let's think step by step. He got money from 20 / 2 = 10 households per day. So that means he got money from 10 * 5 = 50 households. Each of those houses gave 20 * 2 = $40. So he raised 40 * 50 = $2000.. The answer is: 2000.

Jackson is making pancakes with three ingredients: flour, milk and eggs. 20% of the bottles of milk are spoiled and the rest are fresh. 60% of the eggs are rotten. 1/4 of the cannisters of flour have weevils in them. If Jackson picks a bottle of milk, an egg and a canister of flour at random, what are the odds all three ingredients will be good? Give the rationale and then the answer.
Let's think step by step. First find the percentage of milk bottles that are fresh: 100% - 20% = 80%. Then find the percentage of the eggs that aren't rotten: 100% - 60% = 40%. Then find the fraction of the flour canisters that don't have weevils: 1 - 1 / 4 = 3 / 4. Divide the numerator of this fraction by the denominator and multiply by 100% to convert from a fraction to a percent: 3 / 4 * 100% = 75%. Then multiply the probability that each ingredient is good to find the probability they all are: 75% * 80% * 40% = 24%.. The answer is: 24.