9.407x10-11 is the answer
Your best bet would be __ × 7= 56, where the blank space represents the amount of vans needed to take the students to the game.
-Hope this helps!
Answer: 
<u>Add () on 6</u>

<u>Multiply 6 on both sides</u>
<u></u>
<u></u>
100% increase. If you think about it, a 50% increase in price would be 7.5 (15/2), so therefore a 100% increase would just be $15.
I think the answer will be B. Hope it help!