Answer:
Hello!!
If the ratio of girls to boys in a class is 3:5, the fraction of the class that are girls is...

Hope this helps!!
I think it’s 18/5 maybe idk try it!
Given that the distance between two lines in the measurement instrument is 0.01m, the maximum error should be 0.01m/2 = 0.005 m.
If you do a good work, the real measure is 1.20m +/- 0.005m, this is between 1.195 and 1.205.
The width of the rectangle is 15in