Exercise 41 Page 42

Express both temperatures using the same unit.

No, because 70^(∘)F is greater than 20^(∘)C.

Practice makes perfect

The given temperatures are in different units. We need to convert one of the temperatures so that both are in the same unit. It does not matter which unit we choose to convert, so let's convert 20^(∘) Celsius to Fahrenheit.

F=9/5C+32^(∘)

Substitute

C= 20^(∘)

F=9/5* 20^(∘)+32^(∘)

MoveRightFacToNum

a/c* b = a* b/c

F=180^(∘)/5+32^(∘)

CalcQuot

Calculate quotient

F=36^(∘)+32^(∘)

AddTerms

Add terms

F=68^(∘)

We know that Thermometer A displays 68^(∘) Fahrenheit. Thermometer B displays a temperature of 70^(∘)F, which is greater than 68^(∘)C, so our friend is incorrect.

Subchapter links

Communicate Your Answer p.35

Monitoring Progress p.36-39

Exercises p.40-42

Exercise 41 Page 42

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