**Problem : **
Evaluate log 10000000.

7.

**Problem : **
Evaluate log 36.

1.556.

**Problem : **
Evaluate log 4128.

3.616.
**Problem : **
Evaluate log 512.

2.709.
**Problem : **
Evaluate ln *e*^{12}.

12.

**Problem : **
Evaluate ln 15.

2.708.
**Problem : **
Evaluate ln 62.

4.127.
**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?

$1229.31.

**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?

4.6%.

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

$768.34

**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?

19 years.