The total tons of trash that was thrown away by the people is 3.9 tons.
The first step is to convert pounds to tons
1 pound = 0.0005 tons
40 x 0.0005 = 0.02 tons
The second step is to multiply 0.02 by 195
0.02 x 195 = 3.9 tons
To learn more about multiplication, please check: https://brainly.com/question/13814687
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