2) 3.153*10⁴ × 3.92*10⁴ = (3.153*3.92)*10⁽⁴⁺⁴⁾
.. = 12.35976*10⁸
.. ≈ 1.236*10⁹ . . . . . people living in India
3) The mantissa was greater than 10, so a factor of 10 was removed from it and added to the exponent
4) (2.844*10⁹)/(4.5*10⁶) = (2.844/4.5)*10⁽⁹⁻⁶⁾ = 0.632*10³
Amy apparently adjusted the magnitude of the mantissa without adjusting the exponent. The correct normalized form is
.. 6.32*10²
