(1) Chau has a cellular phone, its mass is about 100? we are asked to determine if its measure in Grams or kilograms.
Kilogram is a bigger unit of mass and its used to measure weights of heavier objects.
Grams is used is used for measuring lighter objects.
Therefore the mass of Chaus cellular phone has a mass of 100 grams.
(2) Miguel’s classroom is about 8? We are asked to determine if its measured in Millimeters, centimeters, meters or kilometers?
Millimeters and centimeters are used to measure a very small length. Kilometers are used to measure length or disances that are very massive.
Meters can be use to measure a distance of the size of a class roome
Miguel's classroom is about 8 meters.
(3) it took about 170? Millimeters or liters of water to fill the bathtub.
Millimeter is used to measure distances and length.
Water is measured in liters.
Therefore, it took 170 liters of water to fill the bathtub.