Can someone please explain this??

What is the most important aspect of marking media? a. data labelingb. content descriptionc. electronic labelingd. classification

By refraining from constructing a building until they are certain that it will not cause harm to the environment, an organization is adhering to the

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e.g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?