[Question]Melissa is repairing her shoes. For each shoe, it takes her 5 minutes to replace the buckle and 10 minutes to even out the heel. How many minutes does Melissa spend on this project total?
[Answer]First find the total time Melissa spends per shoe: 5 minutes + 10 minutes = 15 minutes. Then double that amount because there are 2 shoes: 15 minutes * 2 = 30 minutes. The answer is 30.

[Question]Hannah is buying some apples for $5 per kilogram. If she would get a 40% discount on each kilogram of apples, how much would she pay for 10 kilograms of them?
[Answer]A 40% discount on each kilogram of apples would mean the price being 40 / 100 * 5 = $2 smaller. So one kilogram of apples would cost not $5, but 5 - 2 = $3. So for 10 kilograms of apples Hannah would pay 3 * 10 = $30. The answer is 30.

[Question]The weights of Christine's two cats are 7 and 10 pounds. What is her dog's weight if its weight is twice the sum of her two cats' weights?
[Answer]The sum of the weights of Christine's two cats is 7 + 10 = 17 pounds. Christine's dog weighs 17 x 2 = 34 pounds. The answer is 34.

[Question]Ken likes to bike when it's raining and can cycle 30 miles in 20 minutes during this time. However, when it's snowing Ken can't stand the cold and can only cycle 10 miles in 20 minutes. If it rains 3 times and snows 4 times in one week, how many miles did Ken reach if he cycles 1 hour a day?
[Answer]
For 1 hour on a rainy day, Ken can cycle 3 * 30 = 90 miles. For 1 hour on a snowy day, Ken can cycle 3 * 10 = 30 miles. On the rainy days this week, Ken cycled 90 * 3 = 270 miles. On the snow days of the week, Ken cycled 30 * 4 = 120 miles. In total, Ken cycled 120 + 270 = 390 miles this week. The answer is 390.