Jan enters a double dutch competition.  After training she doubles her speed which used to be 70 skips per minute.  How many skips does she do in 5 minutes?
How many skips does she do in a minute? ** She does 70*2=<<70*2=140>>140 skips a minute
How many skips does she do in 5 minutes? ** So he does 140*5=<<140*5=700>>700 skips in the 5 minutes
#### 700