Piper saw a large box of ping pong balls with 48 balls in each layer if the box has 5 layers how many balls can the box hold

If the imperial dynasty had continued to rule china, it is most likely that a) the economy would have improved rather than weakened b) european nations would have gotten more of a foothold in china c) revolutionary groups would not have gained any power in the country d) communism would not have received support among the poor