Rick has started working on his latest album. He has started recording in his studio and has ensured that the studio is equipped with the best possible instruments. However, despite taking all precautions, some background sound is recorded with his music. What should he do to avoid such disturbances? A.
place the microphone’ s shock mount near the source of sound
B.
place a bidirectional microphone near the source of sound
C.
place the recording microphone closest to the source of sound
D.
place the recording microphone farthest from the source of sound

At an open or uncontrolled intersection, yield if a. the cross road has more lanes than yours b. the cross road has fewer land than yours c. you’re on a state highway and the cross road is a secondary road d. do you have three or more passengers in your vehicle

Look at the far left lane in the picture. explain what the red car is doing and what it needs to do to travel safely.

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?