Posted by Tyler on Tuesday, February 26, 2008 at 8:55pm.
The area of all the walls scales with the square of the linear dimension, as they remain similar in shape but increase in size. Doubling all the linear dimensions multiplies tha total area by 4. Painting the enlarged room therefore takes 4 x 3 = 12 days.
At an automotive repaire shop, 3.5 h of labour costs $311.50.
a) What is the labour charge a 5-h job?
b) How could you check you answer?
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