Question: Given a cache access time of 20ns, a main memory access time of 1000 ns, and a cache hit ratio of 90 percent. Assuming fetches

Given a cache access time of 20ns, a main memory access time of 1000 ns, and a cache hit ratio of 90 percent. Assuming fetches to main memory are started in parallel with look-ups in cache, calculate the effective (average) access time of this system. (There is no virtual memory on this system -- no page table, no TLB). You may leave this as an expression.

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