Question

missed this? watch kcv: significant figures in calculations, iwe: significant figures in addition and subtraction; read se perform each calculation to the correct number of significant figures. part a 1458.2 + 9.77 + 4.32 1472.3 1472 1472.29 1472.290 submit previous answers request answer x incorrect; try again; one attempt remaining incorrect; try again. part b 0.009 + 0.09879 0.11 0.1078

Explanation:

Step1: Add the numbers in Part A

$1458.2+9.77 + 4.32=1458.2+(9.77 + 4.32)=1458.2 + 14.09=1472.29$
For addition and subtraction, the result should be rounded to the same number of decimal - places as the number with the fewest decimal places among the values being added or subtracted. 1458.2 has one decimal place, so we round 1472.29 to one decimal place, getting 1472.3.

Step2: Add the numbers in Part B

$0.009+0.09879 = 0.10779$. The number 0.009 has three decimal places. Rounding 0.10779 to three decimal places gives 0.108. But if we consider significant - figures rules for addition (rounding to the least number of decimal places of the values being added), 0.009 has the least number of decimal places (three in the decimal part), and when we consider significant figures in the context of addition, we round to the hundredths place since 0.009 is precise to the thousandths place and the other number 0.09879 is more precise. Rounding 0.10779 to two decimal places gives 0.11.

Answer:

Part A: 1472.3
Part B: 0.11