Range = 60-0=60
Median = 30
Interquartile Range = 35
You would have a 26% chance. If you cross multiply using 15/100 and 40/x. 100 times 40 then divide by 15.
Brett offered 1,237,188 for the house
(f-g)(x) is equivalent to f(x) - g(x)
So that would be (2x²-5) - (x²-4x-8) = 2x² - x² + 4x + 8 - 5 = x² + 4x + 3
Hope this helps.