Question

8 multiple choice 1 point round 300 to have 2 sig figs. (remember scientific notation) 3.0 x 10^2 30 3 x 10^2 33 9 numeric 1 point perform the calculation and report your answer using sig figs. 3.42 + 4 + 5.2 + 12 answer

Explanation:

Step1: Determine significant - figures for 300

The number 300 has 1 significant - figure. To express it with 2 significant - figures, we use scientific notation. In scientific notation, we write it as $3.0\times10^{2}$.

Step2: Calculate the sum for the second part

First, add the numbers: $3.42 + 4+5.2 + 12=24.62$.
For addition and subtraction, we look at the number of decimal places. The number 4 has no decimal places, so our answer should be rounded to no decimal places. Rounding 24.62 to no decimal places gives 25.

Answer:

1. A. $3.0\times10^{2}$
2. 25