Light glows for every 13 seconds . How many times did it between 1:57:58 and 3:20:47 am Choose one:
A) 381
B) 382
C) 383
D) 384
E) 385

Rationale: the diff in sec between 1 : 57 : 58 and 3 : 20 : 47 is 4969 sec , 4969 / 13 = 382 . so total 383 times light ll glow answer : c
Answer: C