Why do the tropics get more energy per unit area from the sun than do the higher latitudes (say, 50° north or south) even when both get 12 hours of sunlight per day?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Apool measures 100 meters by 100 meters a toddler inside the pool and trows a ball 60 centimeters from one edge of the pool. how far is the ball from the opposite edge of the pool

What is the simplified form of square root of 400 to the 100th power ?