Indicate whether the rounding is correct:4.25002 ± 0.1 → 4.2 ± 0.1

Perform the following mathematical operations, and express the result to the correct number of significant figures. a. 6.022 X 10-23 1.05 x 102 b. 6.626210342.9981082.54109 c. 1.285 102 + 1.24 103 + 1.879 101 d. (1.00866-1.00728)6.022051023 e. 9.8751029.7951029.875102100(100isexact) f. 9.42102+8.234102+1.6251033(3isexact)

For each of the following numbers, by how many places must the decimal point be moved to express the number in standard scientific notation? In each case, will the exponent be positive, negative, or zero? 55,651 0.000008991 2.04 883,541 0.09814

What is the difference in surface area between two circles, one of radius 7.98 cm, the other of radius 8.50 cm? The surface area of a circle of radius r is r2. Obtain the result to the correct number of significant figures.

Perform the following calculations and express the answer with the appropriate number of significant figures: 36. 73.62 + 112.9 40. (6.6262×10–34 ) × (2.998×108 ) / (2.54×10–9 ) 37. 167.42 × 1.94 41. 9.27 × (4.987 − 4.962)

Do the following calculation and express the answer using the correct number of significant figures. = (1.21 x 103 + 1.3 × 103) x 6.453 × 10² O 1.6 02 O 1.62 O 1.619

Question 1: Determine whether the answer to each calculation has the correct number of significant figures. If not, correct it: 1A) 89.763 + 22.4581 = 3.997 1B) 4.32x1012 ÷ 3.1x104 = 1.4x1016 Question 2: Perform this calculation to the correct number of significant figures 9443 + 45 – 9.9 x 8.1x106 Question 3: Perform the following conversions: 3A) 78.3 cm to inches 3B) 22.5 lbs. to micrograms 3C) 396 in to L 4A) A new penny has a mass of 2.49g and a volume of 0.349cm³. Is the penny pure copper?

Evaluate 6×0.222×7.0 and round the answer appropriately. Express your answer numerically using the appropriate number of significant figures.     Part B Evaluate 0.411+9.9+0.8 and round the answer appropriately. Express your answer numerically using the appropriate number of decimal places.   Part C Evaluate 16.83 over 15 −0.46 and round the answer appropriately. Express your answer numerically using the appropriate number of significant figures or decimal places.

Please see attached

Carry out the following mathematical operations, rounding your answers to the correct number of significant figures.