what is the problem of (5.1x10³x(3.2x10³)

Answer 1

No parentheses are required in the first member of the expression.

The correct expression is:

5.1x10³x(3.2x10³)

Answer 2

5.1 * 10^3 * 3.2 * 10^3 = (5.1*3.2) * 10^6
= 16 * 10^6
= 1.6 * 10^7