Sig figs: 20.570-20.522=? I just need the correct way to write it with Significant figures

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I. Write the number of significant figures for each example.Number Sig. FigsNumber Sig Figs0.120 3 565,90040.002300 8700700.00 462,119220 0.0000701 II. Write each number in scientific notation AND 4 significant figures.StandardScientific Notation Standard Scientific Notation985,200 9.852 x 10^5 0.0000039998 4.000 x 10^-60.0088542 300,000,000,0001509.774 36.95480.00000036628 22,778III. Solve the following using correct significant figures.15.9994 + 12.011 + 1.0079 + 107.92 + 35.453 = Answers 486.7926 + 187.4255 + 38.744 + 116.5 = IV. Solve the following problems. Write answers in BOTH SCIENTIFIC AND STANDARD notation. Use correct significant figures. Problem Standard use sig figs Scientific use sig figs 7.256 x 10^ 23/1.22669 x 10^5 (92,035.85 x 8.01 x 10^-3)/ 8.644 x 10^-6(7400 - 2175)/ 4.5054 x 10^2