select the correct answer.\na pound is approximately 0.45 kilogram. a person weighs 87 kilograms. what is…

select the correct answer.\na pound is approximately 0.45 kilogram. a person weighs 87 kilograms. what is the persons weight, in pounds, when expressed to the correct number of significant figures?\n\na. 190 lb\nb. 180 lb\nc. 52 lb\nd. 39 lb

select the correct answer.\na pound is approximately 0.45 kilogram. a person weighs 87 kilograms. what is the persons weight, in pounds, when expressed to the correct number of significant figures?\n\na. 190 lb\nb. 180 lb\nc. 52 lb\nd. 39 lb

Answer

Explanation:

Step1: Set up conversion formula

Let $x$ be the weight in pounds. We know that $1$ pound $\approx0.45$ kilogram, so the formula for conversion is $x=\frac{87}{0.45}$.

Step2: Calculate the value

$x = \frac{87}{0.45}\approx193.33$.

Step3: Determine significant - figures

The value 87 has 2 significant figures. So, we round 193.33 to 2 significant figures. Rounding 193.33 to 2 significant figures gives 190.

Answer:

A. 190 lb