Step by step how to solve proportions

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

47 - 90 = 43

43 - 180 = x

x = 137

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)