River math: A river flows 1,280 miles from its source (elevation of 4,318ft) to empty into the Gulf of Mexico. What is the gradient of this river? Please epain how you got the awnser

How did geographic isolation affect the islands in the australasia ecozobne?

Anight-club bouncer, now a top official, put coke or pepsi in it; first three initial. combine all lakes; but i still have more, of all the places; i have the largest shore. what am i? ?

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle