Daphney buys 5 kg of potatoes at the supermarket. If 2 kg of potatoes costs $6, how much will she pay?
Let's think: The price per kilogram of potatoes is $6 / 2 = $3. To buy 5 kg of potatoes, she will have to pay 5 * $3 = $15.. The answer is: 15.

A volcano erupts and spews ash into the sky. The ash cloud spreads out in a diameter eighteen times as far as the distance it shot up into the sky. If the ashes erupted three hundred feet into the sky, what was the radius of the ash cloud in feet?
Let's think: The ash cloud spread out 300 * 18 = 5400 feet in diameter. The radius is half the diameter, so the ash cloud had a radius of 5400 / 2 = 2700 feet.. The answer is: 2700.

Every day, while going to school, Shane drives a total of 10 miles. Calculate the total distance he drives in an 80 day semester from home to school and back.
Let's think: To go to school and back, Shane drives 2 * 10 = 20 miles per day. In 80 days of a semester, he drives for 80 * 20 = 1600 miles.. The answer is: 1600.

There are ten more newborn elephants than baby hippos. If an entire herd starts with 20 elephants and 35 hippos, and the female hippos, whose number is 5/7 of the total number of hippos, give birth to 5 new baby hippos each, find the number of animals that are there altogether?
Let's think:
The total number of female hippos is 5 / 7 * 35 = 25. If each new hippo gives birth to 5 new baby hippos, the total number of baby hippos will be 5 * 25 = 125. The population of hippos after 125 new ones are born is 125 + 35 = 160. There are ten more newborn elephants than baby hippos, meaning there are 125 + 10 = 135 new baby elephants. The population of elephants is 135 + 20 = 155. Altogether, there are 155 + 160 = 315 animals.. The answer is: 315.