Given the expression 
Take a logarithm
from both side of the given expression:

From the property
you have that

Then

Answer: correct choice is C
Answer: -4
Step-by-step explanation:
-1.5(4-r)=-12
Divide both sides by -1.5
4-r=8
-r=4
r=-4
Therefore, the value of r is -4
área = 6 lados ^ 2
volumen = lado ^ 3
caras rato es 2: 5
la proporción de áreas es 2: 5
para volúmenes,
longitud de 1 lado = √2: √5
cubo que
2√2: 5√5
la relación de volúmenes es 2√2: 5√5
I think the answer is c I hope this help
Without a picture, no way to solve this