F 9 5 C 32
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The formula F=9/5*C + 32 gives the relationship between the temperatu
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Updated on: 23 Jul 2019, 06:24
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The formula F=9/5*C + 32 gives the relationship between the temperature in degrees Fahrenheit, F, and the temperature given in degrees Celsius, C. If the temperature is 85 degrees Fahrenheit, what is the temperature, to the nearest degree, in degree Celsius?
A. 18C
B. 23C
C. 29C
D. 47C
E. 51C
Originally posted by rnz on 13 Jan 2018, 15:03.
Last edited by Bunuel on 23 Jul 2019, 06:24, edited 2 times in total.
Renamed the topic, edited the question and added the OA.
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu
[#permalink]
13 Jan 2018, 15:08
rnz wrote:
The formula F=9/5C + 32 gives the relationship between the temperature in degrees Fahrenheit, F, and the temperature given in degrees Celsius,C. If the temperature is 85 degrees Fahrenheit, what is the temperature, to the nearest degree, in degree Celsius?
A. 18C
B. 23C
C. 29C
D. 47C
E. 51C
\(F=\frac{9}{5}C + 32\)
If F = 85, then \(85=\frac{9}{5}C + 32\);
\(53=\frac{9}{5}C\);
\(C=53*\frac{5}{9} \approx 54*\frac{5}{9}=30\).
Answer: C.
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu
[#permalink]
13 Jan 2018, 15:10
rnz wrote:
The formula F=9/5*C + 32 gives the relationship between the temperature in degrees Fahrenheit, F, and the temperature given in degrees Celsius, C. If the temperature is 85 degrees Fahrenheit, what is the temperature, to the nearest degree, in degree Celsius?
A. 18C
B. 23C
C. 29C
D. 47C
E. 51C
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu
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14 Jan 2018, 08:22
rnz wrote:
The formula F=9/5*C + 32 gives the relationship between the temperature in degrees Fahrenheit, F, and the temperature given in degrees Celsius, C. If the temperature is 85 degrees Fahrenheit, what is the temperature, to the nearest degree, in degree Celsius?
A. 18C
B. 23C
C. 29C
D. 47C
E. 51C
Alternative approach, work around by plugging in the options as this question talks about approximate values
Use options (C) the middle value ( As the options are in ascending order )
\(F=\frac{9}{5}*C + 32\)
Or, \(30*\frac{9}{5} + 32 = 86\)
Thus, answer must be (C)
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu
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05 Oct 2020, 21:31
Here, since the values are far apart, approximation can be helpfu
\(F = \frac{9}{5} * C + 32 = 1.8C + 32\)
Now, if we take 1.8C as 2C, this becomes easy. Substituting for the values, we see which is closest to 85 (we must remember that the actual value will be a little lesser than what we have actually comberan).
Option A:
C = 18. Then F = ( 2 * 18) + 32 = 36 + 32 = 68
Option B:
C = 23. Then F = ( 2 * 23) + 32 = 46 + 32 = 78
Option C:
C = 29. Then F = ( 2 * 29) + 32 = 58 + 32 = 90 => This is closest to 85
We can check the other options, but it becomes unnecessary after this point.
Option C
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu
[#permalink]
06 Oct 2020, 01:10
F = \(\frac{9}{5}\) * C + 32
=> \(\frac{(5)(F – 32) }{ 9}\) = C
=> \(\frac{(5)(85-32) }{ 9}\) = C
=> C = 29
Answer C
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Re: The formula F=9/5*C + 32 gives the relationship between the temperatu [#permalink]
06 Oct 2020, 01:10
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