N(n+1)(n+2)(n+3) is a multiple of 4

Step-by-step explanation:

note : prduct two consuctif numbers is even number

so : n(n+1) = 2k

      (n+2)(n+3) = 2k'

n(n+1)(n+2)(n+3) = 4kk'

n(n+1)(n+2)(n+3) = 4a    a=kk' so multiple of 4

she gotta workk that a 2

step-by-step explanation:

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)