Can someone help me with this?

Answer this question! 30 points and brainliest! only if you know the answer.

Franco wants to double the volume of the cone. what should he do?

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?