Answer :
Final answer:
The incorrect measurement among the options given is 84 cm = 8.4 mm. The correct conversion is that 84 cm is equivalent to 840 mm.
Explanation:
The question involves identifying which of the given measurements are not equivalent. We need to be familiar with the conversion of units within the metric system to answer this question.
- 84 cm = 8.4 mm is incorrect because 84 cm is equivalent to 840 mm. The correct conversion for centimeters to millimeters is to multiply by 10.
- 24 dL = 2.4 L is correct because the prefix 'deci' in deciliters means 'tenth', so 24 deciliters is indeed 2.4 liters.
- 183 L = 0.183 kL is correct because the prefix 'kilo' in kiloliters means 'thousand', so 0.183 kiloliters is indeed 183 liters.
- 25 mg = 0.025 g is correct because there are 1000 milligrams in a gram; therefore, 25 milligrams is 0.025 grams.
- 150 msec = 0.150 sec is correct because the prefix 'milli' in milliseconds means 'thousandth', so 150 milliseconds is indeed 0.150 seconds.
The only incorrect measurement is option (a) 84 cm = 8.4 mm.
