Celsius to Fahrenheit
Date: 04/26/99 at 20:05:42 From: Jessica Subject: Celsius and Fahrenheit question One January night at 9:00 p.m. the temperature was -3 degrees Celsius. Between 9:00 p.m. and midnight the temperature dropped 6 degrees. Between midnight and 10:00 a.m. the temperature rose 8 degrees. By noon the temperature had dropped another 4 degrees. What was the temperature at noon? Now here's the difficult part: Give the noon temperature in degrees Fahrenheit, not in degrees Celsius. I got the first portion done. The answer would be -5 degrees, right? But I don't have a clue about how to answer the second portion. How do you get the Celsius into Fahrenheit?
Date: 04/29/99 at 11:59:58 From: Doctor Jeff Subject: Re: Celsius and Fahrenheit question Hello, Jessica. Good job on the first part of the problem. For the second part, there is a formula to convert between Celsius and Fahrenheit. F = (9/5)*C + 32, where F is degrees Fahrenheit and C is degrees Celsius [Note that "*" means "times." Also, (9/5) = 1.8, if that makes calculations easier.] For example, if the temperature is -10 C, you would get: F = (9/5)*(-10) + 32 = -18 + 32 = 14 You might be wondering whether this formula always works. You can try out some of the following well-known Celsius temperatures to check: Freezing point of water: 0 C Human body temperature: 37 C Boiling point of water: 100 C You should get familiar temperatures for these. If you want to convert from Fahrenheit to Celsius, just solve the formula for C: F - 32 = (9/5)*C (5/9)*(F - 32) = C, so C = (5/9)*(F - 32) If the temperature is 14 F, then you should get C = (5/9)*(14-32) = (5/9)*(-18) = -10 Good luck with the rest of the problem! - Doctor Jeff, The Math Forum http://mathforum.org/dr.math/
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