The radius of a hydrogen atom is 0.0000000529177 of a millimeter. Express this number as an approximation.(1 point)

Answer 1

To express this number as an approximation, we can round it to a convenient number of significant figures.

Rounding to four significant figures, the radius of a hydrogen atom is approximately 0.000000053 mm.

Answer 2

How many times is 4 × 10^4 larger than 2 × 10^2?(1 point)

Answer 3

To determine how many times one number is larger than another, we divide the larger number by the smaller number.

In this case, 4 x 10^4 is the larger number and 2 x 10^2 is the smaller number.

Dividing the larger number by the smaller number:

(4 x 10^4) / (2 x 10^2) = 2 x 10^2

So, 4 x 10^4 is 200 times larger than 2 x 10^2.