Perform the following calculations and express your answer using the correct number of significant digits. (a) A woman has two bags weighing 13.5 pounds and one bag with a weight of 10.2 pounds. What is the total weight of the bags? (b) The force on an object is equal to its mass multiplied by its acceleration . If a wagon with mass 55 kg accelerates at a rate of 0.0255m/s2, what is the force on the wagon? (The unit of force is called the newton, and it is expressed with the symbol N.)

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Estimate of calculation