Simplify 0.5(8*10^5)

$0.5 (8 \cdot 10^{5})$

Group coefficients together and exponents together to multiply numbers in scientific notation.

$(0.5 \cdot 8) (10^{5})$

Multiply $0.5$ by $8$ .

$4 \cdot 10^{5}$

The result can be shown in multiple forms.

Scientific Notation:

$4 \cdot 10^{5}$

Expanded Form:

$400000$