7523 14598 1459810 2 b 2 79500250318 31810 2 c 70 10 3 80 10 4 007

7523 14598 1459810 2 b 2 79500250318 31810 2 c 70 10

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145.75+.23= 145.98= 1.4598*102b.79,500 ÷ (2.5 × 102)79,500/250=318= 3.18*102c.(7.0 × 10–3) – (8.0 × 10–4).007-.008=.0062= 6.2*10–3d.(1.0 × 104) × (9.9 × 106)1Copyright © 2017 by Thomas Edison State University. All rights reserved.
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4.What is the number of significant figures in each of the following measurements? (8 points)425d.2900 g - 431g.0.7 min - 125.Express the results in the proper number of significant figures. (12 points)b.3.70 g – 2.9133 g - .79gc.4.51 cm × 3.6666 cm 36.Carry out the following conversions: (16 points)a.22.6 m to dm b.25.4 mg to kilograms kg37.The average speed of helium at 25°C is 1255 m/s. Convert this speed to miles per hour (mph). (4 points)(Reference: Chang 1.41)2Copyright © 2017 by Thomas Edison State University. All rights reserved.
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8.How many minutes does it take light from the sun to reach Earth? (The distance
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