2.20 pounds=1.00 kg D = m/V °F=°Cx1.8 + 32 °C=(°F-32)/1.8

5280 feet = 1 mile exactly 1.609 km = 1 mi Density of mercury =13.6 g/ml

-----------------------------------------------------------------------

1. How many significant figures are in the following numbers?

a) .01623 ______ c) 7.65x10⁵ ______

b) 5.80 ______ d) 9.6260x10^-5 ______

2. Round the following numbers to three significant figures and express them in scientific notation.

a) 95357 ______________ c) .0005379 ______________

b) 68257 ______________ d) 564452 ______________

3. Make the following conversions, showing mathematical setups and expressing the answer to the proper number of significant figures and express the answer in scientific notation.. See the top for some conversions.

a) 62.0x10⁵ mm to km

b) 15 pounds to g

d) 65.0 miles/hour to m/second

4 What volume of mercury has a mass of 252.2 grams? Give the answer to the proper number of significant figures and express the answer in scientific notation.