On a fishing trip you catch a 2.35-lb bass., a 12,1-lb rock cod, and a 12.13-lb salmon. What is the total weight of your catch?
Answer:
On fishing trip you catch a 2.35-lb bass, a 12.1-lb rock cod, and a 12.13-lb salmon.
Watching all these values, the number of digits in the first two masses is 3 and in the third mass it is 4.
Therefore the number of significant figures in the answer should be equal to 3.
Now total weight of the caught is 
As there should be the significant digits in the answer, therefore the total weight you caught is
