



 
Hi Norma, The distance from the origin to a point (x, y) in the plane is S = √[x^{2} + y^{2}] cm. If (x , y) is on the curve y = x^{2} + 2 then this distance is S = √[x^{2} + (x^{2} + 2)^{2}] cm. Simplify this expression. Since the point is moving along the curve S is a function of time t where t is measured in seconds. Differentiate S with respect to t and then substitute dx/dt=5 cm/sec. Penny  


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