Rescue helicopters
This task is about finding and comparing the different costs.
Grabbem Helicopters Ltd. charges a fixed cost of $600 just to get its rescue helicopter in the air, and then an additional cost of $300 for every hour.
a)

Show how to work out the total cost of a search lasting 4 hours.


b)

Show how to work out how long a search would be maintained for a sum of $2 700.


c)

Another helicopter company, Snatchem and Co. sets up, charging no fixed startup fee, but simply $400 per hour of inair time.
Show how to work out which company would give the longer search for a sum of $3 600.
