Question

1. reading metric measurements review

record the mass to the nearest tenth of a gram. g
0.768
70.68
76.8

Explanation:

Step1: Determine the value of each part

The top scale is in grams with a range of 0 - 100g (increments not clear from image, but assume standard balance). The middle scale is 0 - 400g (again, assume standard). The bottom scale is a precision scale (increment 0.1g as we need to round to the nearest tenth).

Step2: Add the values

Assume the top scale reads 20g (from the image's visual - as the slider is at 20), the middle scale reads 0g (slider at 0), and the bottom scale reads 7.0g (since we need to round to the nearest tenth and the slider is at 7). So total mass \(m=20 + 0+7.0=27.0g\) (but wait, no - looking at the dropdown options, maybe mis - interpreted. Wait, the dropdown has 76.8. Let's re - check.
Wait, maybe it's a triple - beam balance. The top beam (0 - 10g, increment 1g), middle beam (0 - 100g, increment 10g), bottom beam (0 - 1g, increment 0.1g). No - wait the dropdown has 76.8. If we assume the top beam (let's say 0 - 50g, but no - looking at the numbers. If we consider that in a typical triple - beam balance problem (even though the image is a bit unclear), if we assume the main beams: one is 0 - 100g (but slider at 0), another 0 - 50g (slider at 20), and the third (precision) at 6.8. But no - the dropdown has 76.8. Wait, maybe it's a single - beam (but no, the problem is "Reading Metric Measurements Review". Another approach: when rounding to the nearest tenth, 76.8 is already to the nearest tenth.

Answer:

76.8