Question

Round off each measurement to the number of significant figures shown in parentheses.

-265.991 (4 sig figs)
-0.0004513 (2 sig figs)
-6593 (2 sig figs)

Please explain.

Answer 1

1) -266.000 2) -0.0004500 3) -6600

Step-by-step explanation:

your welcome :)

Answer 2

We have to round off each measurement to the number of significant figures.

The correct answers are: 265.9, 0.00045 and 65 respectively.

265.991 when expressed in 4 significant figure it rounds off as 265.9 because 265.9 represents the value 265.991.

0.0004513 when expressed in 2 significant figure it rounds off as 0.00045 because zero before and after decimal are not significant.

6593 when expressed in 2 significant figure it rounds off as 65.