In August, the Simons’ water bill was $48. In September, it was 15% lower. What was the Simons’ water bill in September?

Me because some of question i don’t understand

An empty bucket is placed under a faucet dripping at a constant rate of 4 milliliters per minute. with the given information, which of these statements is a reasonable conclusion? a there will be 24 milliliters of water in the bucket after 16 hour. b there will be 60 milliliters of water in the bucket after 14 hour. c there will be 160 milliliters of water in the bucket after 20 minutes. d there will be 100 milliliters of water in the bucket after 40 minutes.

Can any one me with the answers to these questions asap?