Suppose you are asked to find the area of a rectangle that is 2.1-cm \rm cm wide by 5.6-cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round your answer to two significant figures, your answer will fall outside of the grading tolerance and be graded as incorrect.)
Enter your answer to two significant figures and include the appropriate units.
I think this is more a math than a chemistry question but the answer to two significant figures is 12 cm^2.
What value should you use as the area of the base when calculating the answer to Part C?
11.76
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To find the area of a rectangle, you multiply its length by its width. In this case, the length is 5.6 cm and the width is 2.1 cm. To calculate the area, you simply multiply these two values together:
Area = length × width
Area = 5.6 cm × 2.1 cm
Area = 11.76 cm^2
Now, to round the answer to two significant figures, we need to consider the digits after the second significant figure. In this case, the third significant figure is 7. Since it is greater than 5, we round up the second significant figure (1) to 2. Therefore, the rounded answer to two significant figures is:
Area = 12 cm^2
So, the final answer, rounded to two significant figures and with the appropriate units, is:
12 cm²