Answer:
1043ft
Explanation:
1 roll of blue streamer is 94 ft long
1 roll of green streamer is 89ft long
She has 5 rolls of blue streamer and 7 rolls of green streamer.
If 1 blue roll has a length of 94ft, 5 rolls will have a length of 5 × 94
If 1 green roll has a length of 89ft, 7 rolls will have a length of 7 × 89
The total feed of streamer she has to decorate with is calculated as follows:
(5 × 94)ft + (7 × 89)ft = 470 + 623 = 1043ft.