To determine the temperature in Fahrenheit, multiply the Celsius temperature by 1.8 then add 32. Determine the Celsius temperature if it is 89°F outside. Round your answer to the nearest hundredth.

86 degrees F

Step-by-step explanation: To convert from Fahrenheit to Celsius, use this equation:

C = (F-32) x 5/9 ...or... C = (F-32)/1.8

To convert from Celsius to Fahrenheit, use this equation:

F = (C x 9/5) + 32 ...or... F = (C x 1.8) + 32

3. Using Your Head (deg. C to deg. F only)...

Here's a trick for converting Celsius to Fahrenheit in your head:

1) double the Celsius temperature

2) subtract one tenth of this value from itself

3) add 32

let's use 30 degrees C as an example.

1) double the Celsius temperature (2 x 30 = 60)

2) subtract one tenth of this value (60 - 6 = 54)

3) add 32 (54 + 32 = 86 degrees F)

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