a hot air balloon is rising at a speed of 10 km per hour. One hour later, the balloon is still rising at 10 km per hour. What is its acceleration ?

Alake near the arctic circle is covered by a sheet of ice during the cold winter months. when spring arrives, the ice starts to melt. s(t) models the ice sheet's thickness (in meters) as a function of time tt (in weeks). s(t)=-0.25t+4

Which one is true about the hexagons ?

What is the output, or dependent variable of quantity? 1: x 2: f(x) 3: y