Question

1.2 x 10 to the negative 3rd / 4 x 10 to the 6

Answer 1

Answer:

$3 \cdot 10^{-10}$

Step-by-step explanation:

$\dfrac{1.2\cdot 10^{-3}}{4\cdot 10^{6}}=\dfrac{12\cdot 10^{-4}}{4\cdot 10^{6}}\\\\=\dfrac{12}{4}\cdot 10^{-4-6}=3\cdot 10^{-10}$

I like to adjust the operands so the quotient needs no adjustment. Here that means rewriting the numerator to an equivalent value with a mantissa between 4 and 40.