1)  Determine the average rate of change between r = 10 000 km and r = 15 000 km. 2)  Determine the instantaneous rate of change at r = 15 000 km.   3) How much energy must be given to the satellite if r = 12 000 km?

Please explain how to solve, thank you!

The area of a bushfire, A hectares, t hours after the fire has started is modelled by the rule - A = 90f – 3º, t> 0.4

e An airplane flying on a straight flight path will be exactly above a radar tracking station, which is 5,000 km below the path. When the distance of the plane from the station is 40,000 km, this distance decreases at the rate of 8,000 km/hr. At what rate is the plane flying at that instance? novi f. A truck travelling southwards at 40 kph and a car traveling eastward at a rate of 60 kph are headed for an intersection. At what rate are the vehicles approaching each other when the truck is 1 km from the intersection while the car is 2 km from the intersection? g. Water is being poured at the rate of 5 m³/sec into an inverted conical tank of radius 10 m and altitude 20 m. How fast is the water level rising when the water level is at 8 m? (Note: Here you will be using the concepts of similar triangles in order to rewrite the radius in terms of the height.) itoun bont h. A particle is moving along the curve with equation y = 3-x. At the point (2, 1), it was observed that the x-coordinate…