Answer
(a) 6 oz of hamburger.
(b) None.
(c) 0.75 lb and 350 g.
(d) None.
Work Step by Step
(a) The number of hamburgers was counted, and the number of ounces had to be measured*.
(b) Both numbers were counted.
(c) Both numbers were measured.*
(d) Conversions between units from the metric system are usually exact.
* Usually, the mass of objects/things are measured.
