Answer:
512/7 is my own answer for me
I=1.5m
m+1.5m=20
2.5m=20
m=8
20-8=12
Isobel worked 12 hours.
Sum of those 6 angles is 745 degrees
7th angle should make it equal 900
900-745=155
Probably the last option. Because it has the points shown on the coordinate graph.
Mode: ( The number seem the most )
14. 240
15. 3 and 9
16. 60
Range: ( The biggest and smallest number subtracted )
14. 330-210=120
15. 11-3=8
16. 65-57=8