Even after charging your smartphone for several hours, it still appears completely turned off and will not tum on What should you try next to restore it to health?
A.)submerge it in a bag of rice for 24 hours
B.)perform a hard reset
C.)perform a soft reset
D.)plug it into a charger for another hour

What result from the passage of this amendment

Complete the sentence about a presentation delivery method

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)?