Algebra
posted by Grace .
Tire pressure is directly proportional to temp on a temp scale where zero degrees is absolute zero. given that temp in degrees celcius and degrees Fahrenheit are related by the formula F=9/5C +32 and absolute zero is 273.15C, by what % does tire pressure decrease when the temp drops from 80F to 40F? express answer in nearest whole #

Algebra 
Steve
converting Kelvin to Rankine, absolute zero is 459.67°F
so, if the temperature drops by 40°F from 80°F, that is a
40/(459.67+80) = .0741 = 7.41% drop
That means a corresponding drop in pressure. 
Algebra 
Jada Smart girl
I aggre but you made a mistake
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