AB=DE is a true statement
1hr 30 mins= 60mins+30mins=90mins
140$=90mins
In one minute, they make 140/90=14/9
in 9 hours=9*60mins=540mins
540*14/9=840
therefore,they make 840$ in 9 hours
It is-12 for the determination
The change in temperature would be negative.
Explanation: -10 - (-2) = (-8)