Answer: 8400 words
Work Shown:
70 words = 30 seconds
2*(70 words) = 2*(30 seconds)
140 words = 60 seconds
140 words = 1 minute
Susie can type 140 words per minute (wpm)
60*(140 words) = 60*(1 minute)
8400 words = 60 minutes
8400 words = 1 hour
Susie can type 8400 words in 1 hour.