Question

to add (b) 6.19x10 is to the power -3 and 4.256 x 10 is to the power-5​

Answer 1

$6.19 \times {10}^{ - 3} + 4.256 \times {10}^{ - 5} \\ \\ = > 619 \times {10}^{ - 5} + 4.256 \times {10}^{ - 5} \\ = > {10}^{ - 5} (619 + 4.256) \\ \\ = > 623.256 \times {10}^{ - 5} \\ \\ answer$