Complete the following sentences that describe evidence found in the k-t boundary layer.
[shocked quartz, meteorites, iridium, soot, solidified rock "droplets", dust, chicxulub]
the presence of suggests an impact because these mineral grains form only under high-pressure conditions.
the presence of is thought to indicate that rock splashed upward by an impact was molten as it fell back down from the sky.
the unusually high abundance of in this layer suggests that this material came from the impact of an asteroid (or comet).
the presence of that there were world-wide forest fires at the time this layer formed.

Question 3 options: ps.55 four corners is an ibc company that sells delicious navajo tacos in the crossroads food court. part of their success can be attributed to the freshly fried indian bread that is used not only for the tacos, but also for dessert items. as demand grows the fry-bread process is becoming a bottleneck. operations management for the company is looking at two different process options to replace the highly manual process currently being used. option 1 (medium automation) would cost $175 to implement whereas option 2 (high automation) would cost $350. with option 1 the variable cost per fry bread produced would be $0.20. the variable cost for option 2 would be $0.09 per fry bread. at what volume (demand) of fry breads is the cost for the two options the same? (display your answer to two decimal places.)