While on vacation in New York, Greg went out for a lunch that cost $100. If sales tax in New York is 4% and he left a 6% tip, how much did Greg pay? Give the rationale and then the answer.
Let's think step by step. The sales tax is worth $100 x 4 / 100 = $4. Greg left $100 x 6 / 100 = $6 tip. So, the total cost for the tax and the tip is $4 + $6 = $10. Therefore, Greg paid $100 + $10 = $110 in all.. The answer is: 110.

Mimi has decided to start going to the gym again. Over the weekend, she spent $8,000 on athletic sneakers and clothes. She spent thrice as much on Nike sneakers as she did on Adidas. What she spent on Adidas was 1/5 the cost of Skechers. If Mimi's Adidas sneakers purchase was $600, what amount did she spend on clothes? Give the rationale and then the answer.
Let's think step by step. The Adidas purchase was 1 / 5 that of Skechers, therefore the Skechers cost 5 * 600 = 3000 dollars. Spending three times the cost of Adidas on Nike sneakers translates to 3 * 600 = 1800 dollars. All together, the three athletic - sneaker purchases cost Mimi 600 + 1800 + 3000 = 5400 dollars. Subtracting the amount spent on athletic sneakers from the total spent gives 8000 - 5400 = 2600 dollars. Mimi therefore spent 2600 dollars on clothes.. The answer is: 2600.

When it rains, the three holes in the garage roof leak water at different rates. The largest hole leaks at a rate of 3 ounces of water per minute. The medium-sized hole leaks water at one-half the rate of the largest hole. And the smallest hole leaks water at a rate of one-third the rate of the medium-sized hole. When it rains, what is the combined amount of water, in ounces, that leak from all three holes over a 2-hour time period? Give the rationale and then the answer.
Let's think step by step. The medium - sized hole leaks at a rate of one - half that of the largest hole, or 3 / 2 = 1.5 ounces per minute. The small - sized hole leaks at a rate of one - third that of the medium - sized hole, or 1.5 / 3 = 0.5 ounces per minute. Combined, the three holes leak at a rate of 3 + 1.5 + 0.5 = 5 ounces per minute. Since one hour is 60 minutes, two hours is 2 * 60 = 120 minutes. In total, over the two hours, the three holes will leak a combined 120 * 5 = 600 ounces of water.. The answer is: 600.