Question

–(7)-¹

Answer 1

$(-5)^{-6}(-5)^9$

$= (-5)^{-6+9}$

$= (-5)^{3}$



$(4 \times 10^{10})(9 \times 10^{-6})$

$= 36 \times 10^{10-6}$

$= 36 \times 10^{4}$