Answer
$70,000.005$
Work Step by Step
RECALL:
$10^{4} = 10,000
\\10^{-2} = \dfrac{1}{10^2} = 0.01
\\10^{-3} = \dfrac{1}{10^3} = 0.001
\\10^{-4} =\dfrac{1}{10^4} = 0.0001$
Thus, the given expression is equivalent to:
$=(7 \times 10,000) + (5 \times 0.001)
\\=70,000+ 0.005
\\=70,000.005$