Answer:
0.3 mm²
Step-by-step explanation:
The question asks for the product with correct number of significant figures.
To get the product we must multiply the numbers:
2.80 mm × 0.1 mm = 0.280 mm²
The correct number of significant figures for the product of two numbers correspond to the least number of significant figures of the initial numbers.
- the first number (2.80) has three significant figures
- the second number (0.1) has one significant figures
The least number of significant figures in this case is one (0.1 has 1 significant figure), hence the answer should have one figure.
We must then round the product to leave it with one significant figure:
2.80 mm × 0.1 mm = 0.3 mm²
