The fridge's thermometer reads 47.3 °F.

Question 76

MediumOriginal question

A vaccine must be stored between 2 °C and 8 °C, both included. A fridge's thermometer reads in °F, where $F = \frac{9}{5}C + 32$ .

The fridge's thermometer reads 47.3 °F. What should the pharmacist do?

Nothing: 47.3 °F is in the rangeCorrect answerYour answerWarm the fridge: it is below 35.6 °FCorrect answerYour answerNothing: it is only 0.9 °F over the limitCorrect answerYour answerCool the fridge: 47.3 °F is above 46.4 °FCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer D

Correct answer: D

The safe range is $35.6 \le F \le 46.4$ .
$47.3 > 46.4$ , so the fridge is too warm (8.5 °C).

Worth noting

47.3 °F is $(47.3 - 32) \times \frac{5}{9} = 8.5$ °C; a small excess still breaks the storage rule.

Concept: Checking a value against a range
Typical timeTypical: 120 s
Your timeYours: —

The rule this testsInequalities from situations

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

Practise this chapter →

Ten questions from Numerical Inequalities, at your own pace.

The fridge's thermometer reads 47.3 °F.

Question 76

Explanation