Light glows for every 13 seconds. How many times did it glow between 1:57:58 and 3:20:47am
To answer this you must say when it glew first in the given time interval. Anyway the time interval contains 4970 seconds and thus the answershould be something near 382-383
"glew"?? Well, why not? The past tense of "blow" is "blew". Obviously, the past tense of "glow" is "glew"!
Gosh, I'm glad English is such a reasonable language!
Separate names with a comma.