Robert looks at the temperature at 10 o'clock in the morning: -5. in the afternoon, he looks at it again: 11. by how many degrees has the temperature risen?

What is the smallest integer n such that n\sqrt{2} is greater than 20

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?