The correct answer is B
We can simply solve to see if it is correct.
Apply the distributive property.
.7*4k-.7*12
2.8k-8.4
This matches the example given in the question.
Hope this helps!
Answer:
B
It can not be c or d because you can't combine unlike factors. It is not a because 0.07 * 4K is not 2.8K
