The dubois formula relates a person's surface area, s, in meters2, to weight, w, in kg, and height, h, in cm, by (a) what is the surface area of a person who weighs 60 kg and is 160 cm tall? (b) the person in part a stays constant height but increases in weight by 0.4 kg/year. at what rate is his surface area increasing when his weight is 64 kg?

Afaulty model rocket moves in the xy-plane (the positive y direction is vertically upward). the rocket's acceleration has components ax(t) = ? t2 and ay(t) = ? ? ? t, where ? = 2.50 m/s4 , ? = 9.00 m/s2 , and ? = 1.40 m/s3 . at t = 0 the rocket is at the origin and has velocity ~v0 = v0x ? i + v0y ? j with v0x = 1.00 m/s and v0y = 7.00 m/s. (a) calculate the velocity and position vectors as functions of time. (b) what is the maximum height reached by the rocket? (c) sketch the path of the rocket. (d) what is the horizontal displacement of the rocket when it returns to y = 0?