Question

1). (6,7·10⁻³)(5·10⁻³)= 2).5·10⁻¹+6·10⁻²+4·10⁻⁴=

Answer 1

$6.7 \times {10}^{ - 3} \times 5 \times {10}^{ - 3} = 33.5 \times {10}^{ - 6} = 0.0000335$
$5 \times {10}^{ - 1} + 6 \times {10}^{ - 2} + 4 \times {10}^{ - 4} = 0.5 + 0.06 + 0.0004 = 0.5604$