1. A plane flying with a constant speed of 14 km/min passes over a ground radar station at an altitude of 8 km and climbs at an angle of 50 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 1 minutes later?

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2. A particle is moving along the curve y=2*sqrt(5x+1). As the particle passes through the point (3https://webwork.math.uga.edu/webwork...144/char3B.png8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.