1.Explain why wrenches are useful for turning tight bolts 2.Explain how a wheelbarrow is useful for carrying heavy loads (they can be given help by telling them that the wheel is where the pivot is and their hands are further away than the load so have a larger force.

What type of question is this lol.

A long-handled wrench makes it easier to unscrew tight bolts. This is because we increase the torque by moving the applied force further from the turning point. Note, it is only the perpendicular component of the force acting on the lever that produces torque.

The pivot is the wheel's axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone.

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.