Question about Texas Instruments TI-30XA Calculator

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How do i enter log (base 3) 3.3 on my calculator to approxiamate to the nearest thousandth?

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Calculate it as log(3.3) / log(3) or ln(3.3) / ln(3.3).

Posted on May 03, 2010

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7.2468901 rounding nearest thousand


I assume you want to round it to the nearest thousandth.

Step 1 - identify the thousandths column - going to the right of the decimal are tenths, than hundredths, than thousandths

Step 2 - check the number immediately to the right of this column

Step 3 - if this number is 5 or greater, add 1 to the thousandths column

Step 4 - if this number is 4 or less - no nothing

Step 5 - delete all numbers to the right of the thousandths column

In this case the 8 is greater than or equal to 5, so we add 1 to the 6 to get 7 and then delete all the numbers to the right.

I get 7.247.

Good luck.

Paul

Oct 27, 2015 | Office Equipment & Supplies

1 Answer

How to round 0.1875 to the nearest thousandth.


Step 1 - identify the thousandths column
Step 2 - identify the number immediately to the right of this column
Step 3 - if this number is 5 or more, add one to the thousandths column. If this number is 4 or less, leave the number in the thousandths column
Step 4 - set all number to the right of the thousandths column to zero.

I get 0.1880, which we normally write as 0.188.

Good luck.

Paul

May 29, 2015 | Office Equipment & Supplies

1 Answer

Log 3 base 10


Press LOG 3 ENTER.

The LOG key on the keyboard gives you base-10 (common) logs while the LN key gives you base-e (natural) logs. If you want the log to another base you can use the logBASE function found in the catalog.

Apr 07, 2014 | Texas Instruments TI-84 Plus Calculator

1 Answer

Round to nearest thousand


Step 1 - identify the thousandths column - going to the right of the decimal point, we have the tenths column, the hundredths column, and the thousandths column

Step 2 - check the number immediately to the right of this column

Step 3 - if this number is 5 or more, add 1 to the thousandths column - if this number is 4 or less, don't add 1 to the thousandths column (leave it alone)

Step 4 - erase all the numbers to the right of the thousandths column.

In this case, the number in the thousandths column is 4. The number immediately to the right of it is a 0. Since the 0 is 4 or less, we don't add 1 to the thousandths column. Now we erase all numbers to the right of the thousandths column. I get 22.524.

Good luck.

Paul

Oct 17, 2013 | Office Equipment & Supplies

1 Answer

How do i use log functions on the HP 39g+. For instance i want to use log10 1000 which should equal 3 or 3^5=243 so log3 243 should equal 5. If i press log the calculator shows: log( If i...


To calculate the common log ( LOG base 10) of a positive number, just press the LOG key, the one above the blue Division key, then enter the number and close the right parenthesis. Press the ENTER key to get the result.

If you want to calculate the log in a base other than e (natural) or 10 (decimal) logarithms, you need to make use of one of the equivalent formulas below

log in base a of a number b
log_a(b)=log_10(b) / [ log_10(a)] or
log_a(b)= ln(b)/ln(a)

Apr 19, 2011 | HP 39g Calculator

1 Answer

I want to know how to enter basic logs into the calculator: Example. Log3^9=2 How can you enter this into the calculator?


The 30XA only has logarithm functions for base e and base 10. However, you can calculate the logarithm to any base by using the relationship logb x = log x / log b = ln x / ln b

To calculate log3 of 9, press
9 LOG / 3 LOG =
or
9 LN / 3 LN =

Apr 03, 2011 | Texas Instruments TI-30XA Calculator

1 Answer

If i needed to enter log 5 to the base 3 into my calculator what buttons would i push?


You can calculate the log of x to any base b by calculating log(x)/log(b) or ln(x)/ln(b). So, to calculate log 5 to the base 3, press
LOG 5 ) / LOG 3 ENTER
or
LN 5 ) / LN 3 ENTER

Jan 25, 2011 | Texas Instruments TI-83 Plus Calculator

2 Answers

5^log(subscript 5) 3


The calculator does logarithms only to base 10 (common) and base e (natural). You can calculate the logarithm to any base by using the relationship logb(x) = log(x)/log(b) = ln(x)/ln(b) .

So, one way to calculate this is as follow:

5 ^ ( LN 3 ) / LN 5 ENTER

Note that the calculator automatically opens the parenthesis when you press LN, and you don't need to close them all before pressing ENTER.

Apr 20, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

How can I use the Log function on my calculator?


Hi ;

for log base 10 use the the "log" key

example :

log(2) + log(3) = log(6)

enter 2 press the log key you will get 0.30102999 press the '+" key than 3 log you should get 0.47712125 for it Press the "=" or enter and you should get 0.778151250 for a answer than press inv or 2nd log and you should get 6 for a answer

and that all there is to it

Oct 07, 2009 | Texas Instruments BA-II Plus Calculator

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