Mark puts an object that has a mass of 58.2 kg in a cart that has a mass of 73.00 kg. how should mark report the total mass to the correct number of significant figures? 131 kg, to have the same number of significant figures as 58.2 kg 131.2 kg, to have the same number of significant figures as 73.00 kg 131.20 kg, to have the same precision as 73.00 kg 131.2 kg, to have the same precision as 58.2 kg

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.