Question

URGENTE
Assinale a alternativa com o valor de z, com (10)22 = 0,0001

A)-3
B)-2.
C)-4.
D)-1.
E)-5.

Answer 1

$\sf{ {(10)}^{2z} = 0,0001} \\ \\ \sf{ {(10)}^{2z} = \frac{1}{10000} } \\ \\ \sf{ {(10)}^{2z} = \frac{1}{10000} } \\ \\ \sf{ {(10)}^{2z} = \frac{1}{ {10}^{4} } } \\ \\ \sf{ {(\cancel{10})}^{2z} = {\cancel{10}}^{ - 4} } \\ \\ \sf{2z = - 4} \\ \\ \sf{z = \frac{ - 4}{2} } \\ \\ \boxed{ \sf{z = - 2}}$

r: item (b)

$\mathcal{ATT : ARMANDO}$