What is the correct way to write the postal abbreviation for the state of pennsylvania

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

(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.)

Which type of basaltic lava flow has a fairly smooth