Is 2 1/2a rational or not rational plz help

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).

Holly's garden is divided into 5 equal sections. she will fence the garden into 3 areas by grouping some equal sections together. what part of the garden would each fenced area be?i forgot how to do it for my lil brother just answer e.