math-percents

Question

The manufacturer of an oven says that the temperatures displayed while cooking are within a 5% error.  Rachel is using the oven to bake a cake that must be cooked at a temperature below 325 degrees Celsius. The oven display shows a temperature of 310 degrees Celsius. Can Rachel be sure that the temperature is suitable for baking her cake? Explain your answer.

Answer 1

Hi Dalinda,

 

A 5% error means that the temperature may be 5% higher or 5% lower than the display.

 

Since the 310 degree display may mean that the actual temperature is 5% lower, Rachel can not be sure that the temperature is suitable for baking her cake.

 

Dan