Hannah drove her car 318.4 km in 4 h. At this speed, how far can she expect to travel in 5.5 h?
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This will help a lot if you go to desmos! Just graph the equation on there! It’s much easier to see on computer
The square root is 
Just square the top and bottom of the fraction. 
and 
so we have 12/16 and then we reduce to 3/4