7. Jimbo and Bob compete in a 100.0 m race. Both racers start from rest. If Jimbo can accelerate at 2.3 m/s² and Bob can accelerate at 2.8 m/s?, How long before Jimbo will
Bob cross the finish line? Assume that both racers accelerate at a constant rate for the
whole race.

Can you guys please give me the proper rounding, knows and unknowns, and also the actual algebra part

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)