Will give brainliest!

what is the unknown scale size?

enter your answer as a decimal in the box. round only your final answer to the nearest thousandth.

Using the two smallest sizes divide the larger of the two by the smaller one:

1 / 0.618 = 1.618

The scale factor is 1.618

Now multiply 1 by that:

1 x 1.618 = 1.618

The missing font size is 1.618.

Can check by multiplying the missing size by the scale factor:

1.618 x 1.618 = 2.618

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)