Train a arrives at central station on the hour and every 12 minutes. train b arrives on the hour and every 15 minutes. when do both trains arrive at the same time?
a) on the hour and 30 minutes past the hour
b) on the hour and 15 minutes to the hour
c) on the hour and 27 minutes past the hour
d) on the hour
explain why you chose the answer and how you achieved it.

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

What line represents the relationship between r and s

Ratio of circumference to diameter example plz i need to now what it looks like.