Posted by Adam on Wednesday, November 9, 2011 at 6:48pm.
Online "*" is used to indicate multiplication, because "x" is often confused with an unknown.
2.9 * 3 = 8.7
When multiplying exponents, you add the value of the exponents.
10^3 * 10^-3 = 10^0 = 1
Answer = 8.7 or 8.7 *10^0