Question21 a) $55 \cdot 10^{-3}=5,5 \cdot 10^{x}$ b) $625 \cdot 10^{-6}=6,25 \cdot 10^{x}$ c) $81 \cdot 10^{-4}=8,1 \cdot 10^{x}$

Studdy Solution
Equate the exponents from both sides to solve for $x$.
$8.1 \cdot 10^{-3} = 8.1 \cdot 10^x \implies x = -3$
Therefore, the solutions are: a) $x = -2$ b) $x = -4$ c) $x = -3$