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`        Find Log218  .  We know that  24  = 16    and 25  = 32  , and that 18 is between  16 and 32; therefore, we know that the exponent we are looking  for is between 4 and 5.  In fact, it is closer to 4 than to 5  because 18 is closer to 16 than it is to 32. `
8 years ago

357 Points
```										Plz Check....
Let's solve this problem by changing the base to 10. Log218   can be  written      Log18 / Log2  .  Using your calculator,

Log18 / Log2  =  1.255273/0.301030 = 4.169927.

Let's check the answer.  If  2 4.169927  = 18   , our answer is correct.2 4.169927  = 18.000025  .  Close  enough.  Why isn't it 18 exactly?
Since we rounded Log18 / Log2   to six places,  our answer won't check exactly.  If we rounded to ten places,  then when we checked the answer, it would be closer to 18 than  this answer.
```
8 years ago
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