QUESTION 1 A mechanical engineer conducted a time study of a particular assembly operation on the assembly line.
Ninety per cent of the workers on the assembly line have at least two years experience, while the rest are
still trainees. He randomly selected 50 workers on the assembly line using stratified random sampling. How
many trainees did he include in his sample?
a) 5
b) 10
c) 45
d) 90

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