Tina is playing a game where she rolls a fair number cube numbered 1 through 6, spins the spinner, and tossed the quarter shown. Which shows all the possible unique combinations of an even number on the number cube, B or C on the spinner, and tails on the quarter?

step-by-step explanation:

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

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)