1g is equal to 0.001kg
678g = 0.678kg
(678 x 0.001 = 0.678)
1:14 means that for every 1 cm it is drawn at it is actually 14 cm
so multiply 4 x 14 = 56
it is actually 56 cm wide
They would make 2,000 because 150X10=1,500+500
3x^2=375
x^2=125
x=11.18
c or d, they say the same thing
Option B:
is the correct answer.
Explanation:
The exponential equation is 
If
, then 
Thus, the equation becomes

Applying log rule,
and thus the equation becomes

Since, we know that,
, using this we get,

Hence, the logarithmic equation which is equivalent to the exponential equation
is 
Thus, Option B is the correct answer.