Question

.
$( 4.9 times 10 ^{ - 3} )(4 times 10 ^{ - 2} )$

Answer 1

$(4.9 times 10 ^{ - 3} )(4 times 10 ^{ - 2}) = \ = 4.9 times 4 times {10}^{ - 3} times {10}^{ - 2} = \ = 19.6 times {10}^{ - 5} = 1.96 times {10}^ { - 4}$