When will an infinite geometric series with -1

There is a simple test for determining whether a geometric series converges or diverges; if −1<r<1, then the infinite series will converge. If r lies outside this interval, then the infinite series will diverge.

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

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)