Question

A pound is approximately 0.45 kilogram. A person weighs 87 kilograms. What is the person's weight, in pounds, when expressed to the correct number

of significant figures?
A.
190 lb
B.
180 lb
C.
52 lb
D. 39 lb

Answer 1

It would be 190 because 87•.45 is 193, and the dig figs makes it 190

Answer 2

Answer: A. 190 lbs.

Explanation: To find the mass in pounds we will use the following conversion factor: 1 lb = 0.45 kg

Solution:

87 kg x 1 lb / 0.45kg = 193 lbs.

Among the choices 190 lbs is the closest so it is the answer.