Atriple beam balance is used to find the mass of an object. the balance has three beams with number scales and sliders that can be moved, a platform that holds the object, and a pointer that tells when the object and sliders are balanced.

in order to use the balance, an object is placed on the platform. then, the sliders on the beams are moved to indicate the mass in hundreds, tens, and ones (and tenths) until
a.
the pointer is at the bottom and the object is at the top.
b.
the pointer and the mass are at zero.
c.
the pointer lines up with the zero mark.
d.
the pointer is at the top and the object is at the bottom.
me