Page 210 exercise N 7
Hi guys any feedback would be much appreciated.

All of my calculations and answers excluding the first one which is correct, differ quite a lot from actual answers.

Am I the only one with this problem? or putting it as politely as possible is the whole book riddled with errors here and there?

Also answers that should be rounded up i.e 31.765 gallons are consistently rounded down to 31.7 instead of 31.8 & vice versa it goes on, and it's always conflicting due to these inconsistencies, which i find quite frustrating.