Noah rides his bike 16 kilometers in 2 hours. What is his average speed? A) 8 miles per hour B) 8 kilometers per hour C) 32 meters per hour

Why should seat belts not be mandatory quick plz

(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.)

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87