**Problem : **
Evaluate log 10000000.

**Problem : **
Evaluate log 36.

**Problem : **
Evaluate log 4128.

**Problem : **
Evaluate log 512.

**Problem : **
Evaluate ln *e*^{12}.

**Problem : **
Evaluate ln 15.

**Problem : **
Evaluate ln 62.

**Problem : **
If $800 is put into a bank account that yields 7.16% interest, compounded
yearly, about how much money is in the account after 6 years?

**Problem : **
$800 is put into a bank account. After 5 years, there is $1006.88 in the
account. What is the yearly compound interest rate of the account?

**Problem : **
An account yields $1400 after 10 years at 6.0% interest, compounded yearly.
How much money was put into the account to start?

**Problem : **
$1000 is put into an account that yields 15% interest, compounded yearly. The
account yields $17287.78. For how many years is it left in the account?

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