147 x 10-5 in proper scientic notation

Perform the following operation and express results in scientic notation (4.2 x 10-3) * (3.5 x 102)

Hexane (C6H14, density = 0.766 g/cm3), perfluoro-hexane (C6F14, density = 1.669 g/cm3), and water are immiscible liquids; that is, they do not dissolve in one another. You place 10 mL of each in a graduated cylinder, along with pieces of high-density polyethylene (HDPE, density = 0.97 g/cm3), polyvinyl chloride(PVC, density = 1.36 g/cm3), and Teflon (density = 2.3 g/cm3). None of these common plastics dissolves in these liquids. Describe what you expect to see.

An electric current of 485.0 mA transports 760. uC of charge. Calculate the time this took. Be sure your answer has the correct unit symbol and 3 significant digits. x10 ロ・ロ X μ 3 5