# 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 #

1. 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.

I aggre but you made a mistake

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