Question

directions: express the results of the following two calculations to the correct number of significant figures and with the correct units. please be sure to highlight and underline your final answer! 12.) 3.21 g + 0.3 g (2 points) preform addition 3.21g + 0.3g =3.51 our second step is to round by just removing the last number which gives us 3.5g 21 / 10000 word 13.) 5.7 cm x 0.2 cm (2 points) 1cm 1 / 10000 w

Explanation:

Step1: Perform addition for 3.21 g + 0.3 g

$3.21+ 0.3=3.51$

Step2: Round to correct significant figures

The number 0.3 has one - decimal - place precision. So, we round 3.51 to one - decimal place, getting 3.5 g.

Step3: Perform multiplication for 5.7 cm×0.2 cm

$5.7\times0.2 = 1.14$

Step4: Round to correct significant figures

The number 0.2 has one significant figure. So, we round 1.14 to one significant figure, getting 1 cm².

Answer:

1. 3.5 g
2. 1 cm²