If anybody wants to compare answers, this is what I got.

1d 2a 3b 4a 5b 6c 7b 8c 9b 10a 11d 12c 13a 14c 15b 16d 17c 18a 19d 20a 21c 22d 23d 24b 25c

26a 117

26b 3

26c 4468km

26d $369.17

26e(i) 0.17 (ii) 0.86

26f 365450163.7km sq

26g $96.36

27a 58.18m

27b 50

27c (i) $250 (ii) 65

27d (i) outlier (ii) none

27e 11min 28 sec

28a 50.27cm sq

28b better in English

28c 4000 cm sq

28d 37.4 deg f

28e (ii) 10cm (iii) Dots not on line.

28f (i) C = 2100 + 0.5N (ii) 700

29a $427.57

29b $100480

29c (i) 12m x 18m (ii) 0.106m

29d (i) $392,000 (ii) $385,250

29e Highest point of graph

30a $240.61

30b 48/95

30c (i) $11136.89 (ii) $407.03

30d 120.31m

30e 1.37m