Question

What is the most accurate representation of the area of a plot measuring 11.7 cm by 15.4 cm?

A) 54 cm^2
B) 54.2 cm^2
C) 180.2 cm^2
D) 180.18 cm^2

(D is incorrect)

Answer 1

The answer is C. First, the area of the plot should be the multiplication of the two side lengths, so 11.7 * 15.4=180.18. However, we have to look at the significant digits to decide to what digit should we round the answer to. Since both 11.7 and 15.4 are accurate to the tenths digit, 180.18 should also be so, so we should round it to 180.2.