Ahummingbird may flap its wings anywhere from 64,800 to 280,800 times in an hour. round the smaller number to the nearest ten thousand.

Which term best describes the association between variables a and b

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?