# What is the LOG function on the HP 10bII calculator?

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The 10bII does not have a key for the common logarithm function. You can use the natural logarithm function (LN, the shifted function of the 2 key) to compute the common logarithm of a number using the relationship
log(x) = ln(x)/ln(10)

In words, calculate the natural log of the value and divide it by the natural log of ten.

Posted on Nov 07, 2010

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Posted on Jan 02, 2017

SOURCE: CPT button on HP Calculator

You don't need a cpt button on Hp 10ii calculator.You can just press the function button that you want to apply without pressing cpt first.

Posted on Oct 07, 2009

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The 10BII doesn't do trig and doesn't have functions for converting between degrees-minutes-seconds and decimal degrees. The 10BII+ does do trig but still lacks the conversions.

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### How do you find out how long it would take to triple an amount at 6% interest, compounded continuously?

Solve the formula e^(rt) = 3 , where r=0.06 per time period

(see http://en.wikipedia.org/wiki/Compound_interest#Continuous_compounding for details)

Taking the logarithm of both sides and rearranging gives: t = ln(3)/0.06 = 18.31 time periods. The logarithm function is a shifted function on the 2 button on the 10bii calculator.

May 09, 2011 | HP 10bII Calculator

### I have a HP 10bII financial calculator. I read that CPT does not apply to this calculator but my numbers are off. Is this correct or am I missing a step on my calculator? Does CPT apply or not?

You can use the I/YR key on the top row to enter/calculate the interest rate.

We can't tell whether your numbers are correct or not without seeing them. Could you post the problem?

Feb 08, 2011 | HP 10bII Calculator

### Cant find the cpt button

You don't need a cpt button on Hp 10ii calculator.You can just press the function button that you want to apply without pressing cpt first.

Jan 22, 2011 | HP 10bII Calculator

### I just want to know where is the compute key on my hp calculator?

It doesn't have one. The calculator keeps track of whether you've hit a digit-entry key since you last pressed a function key. If you haven't, then the calculator computes the value and displays it. If you have hit a number-entry key, it stores the value. Thus, when the book says something like "press CPT then press PMT", you just need to press PMT.

Oct 19, 2010 | HP 10bII Calculator

### Hp 10BII

To change the radix point between US and European modes, press shift then [./,] (the decimal point key).

Jun 10, 2010 | HP 10bII Calculator

### What is the equivalent button for compute (CMT in my text), to use PV,FV,N,I/YR/PMT functions?

Unlike other brand calculators, HP calculators don't need such a key. After entering the other data, simply press the key for the desired value. For example, to find the future value, simply press the "FV" key.

Aug 09, 2009 | HP 10bII Calculator

### CPT button on HP Calculator

You don't need a cpt button on Hp 10ii calculator.You can just press the function button that you want to apply without pressing cpt first.

Dec 17, 2008 | HP 10bII Calculator

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