Answer: B
Step-by-step explanation:
The converse means X --> Y , so Y --> X.
In other terms, you just need to reverse the terms and review that it turns out correct. In answer B, it does that just right.
Answer choice d (7) would be monomial because it's just one number by itself not attached to anything :)
Answer:

Step-by-step explanation:






It's probably A because the fact that it is multiplied by 4 wouldn't change the number of zeros, and 10 to the 3rd power would be 1000 (if you include the X4 in this example it would be 4000).