Question

The width of a rectangle is exactly 2.804 cm. Determine the number of significant figures of the area of the rectangle with a length of 0.005cm

Answer 1

Remember that

The area of a rectangle is equal to

A=L*W

substitute given values

A=0.005*2.804=0.01402 cm2

so

No. of significant figures: 1

No. of decimals: 2

A=0.01 cm2

the answer is one significant figure