How do i convert learning curve firgure of -0.3219(log 0.8/log 2) to number by multplying it to 2500.

Hello,
The first remark is this.
The ratio log(0.8)/log(2) is by definition binary log of 0.8 ( meanibg log in base 2 of 0.8)
The second remark is good news for you.: When in MathIO, [SHIFT][MODE][1:MathI0], your calculator can compute directly the log in any base of any number.
To use the functionality, you press the key below [ON]. It is a log symbols with a small solid square, and and erect empty rectangle.

When you press the key the screen shos a template. In the smaller and lowered square goes the base (here 2). When you enter the base, press the right arrow to move cursor to the rectangle inside the parentheses and type in 0.8. Use the right arrow to move the cursor out of the parentheses.

Practice: try that. the result should be -0.321928095. Good.
Now use the replay button to move cursor to the command line outside the right parenthesis. I am going to give you the other key stokes. Let **log(2,0.8) be my representation for log in base2 of 0.8.** Then you enter the rest of the calculation as

**log(2, 0.8) [*] [ ( ] [(-)] 0.321 [ ) ] [*] 2500 [=] **

Here [*] is the multiplication sign
[(-)] is the negation (change sign), just above the [RCL] key.

[ ( ] is the left parenthesis and [ ) ] its matching right parenthesis. Both of them enclose the number -0.321. It underlined them for clarity.

The result should be 259.0716344

If you do not like what I did above, you can always do things the old way. You use the log key just above the [COS] key. In that case
-0.3219*[LOG] (0.80)/[LOG] 2 * 2500.
Do not to supply the ) for both log. The calculator inserts the left ones by default.

Hope it helps.

Posted on Nov 01, 2009

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Posted on Jan 02, 2017

You need to find out what number x is 100%.

Start out with the facts known, 50 is 20% of this x, and write it down in mathematical symbols. This is just a translation of the words in your problem to the shortcut equation language used in math, the meaning is exactly the same, and with a little more experience you will easily move between these two.

50 = x * ( 20 / 100 )

Remember, 'percent' is from latin "per one hundred".

Multplying left and right side of the equation by 100 yields:

50 * 100 = x * ( 20 / 100 ) * 100, consolidation results in:

5000 = x * 20. Divide both sides by 20:

5000 / 20 = x * 20 / 20, consolidate:

250 = x.

This is your result, 250.

Start out with the facts known, 50 is 20% of this x, and write it down in mathematical symbols. This is just a translation of the words in your problem to the shortcut equation language used in math, the meaning is exactly the same, and with a little more experience you will easily move between these two.

50 = x * ( 20 / 100 )

Remember, 'percent' is from latin "per one hundred".

Multplying left and right side of the equation by 100 yields:

50 * 100 = x * ( 20 / 100 ) * 100, consolidation results in:

5000 = x * 20. Divide both sides by 20:

5000 / 20 = x * 20 / 20, consolidate:

250 = x.

This is your result, 250.

Mar 19, 2014 | Office Equipment & Supplies

In general you cannot. If the square root happens to be an integer (ex: SQRT (4)=2) or a rational number (SQRT(16/9)=4/3) you can convert from one form to the other, but that is the same as converting from a decimal to a fraction.

However you can never convert 1.414213562 (the first 10 digits of SQRT(2)) into the radical SQRT(2). The reason is that root here is an irrational number: its decimal representation is endless and not periodic (non repeating).

However you can never convert 1.414213562 (the first 10 digits of SQRT(2)) into the radical SQRT(2). The reason is that root here is an irrational number: its decimal representation is endless and not periodic (non repeating).

Nov 17, 2013 | Texas Instruments TI-30 XIIS Calculator

Press Y=

On the Y1 line enter the expression LOG(X+2)+LOG(X+3) by pressing

LOG ALPHA [X] ) + LOG ALPHA [X] + 3 )

On the Y2 line enter the expression 7-X by pressing

7 - ALPHA [X]

Press GRAPH to see the graph. To see where they intersect, press 2ND [CALC] 5. See "First curve?" in the lower left. Use up/down-arrow to select one of the two curves and press ENTER. See "Second curve?" in the lower left. Use up/down-arrow to select the other curve and press ENTER. See "Guess?" in the lower left. Press ENTER. The calculator will show the coordinates of the intersection.

On the Y1 line enter the expression LOG(X+2)+LOG(X+3) by pressing

LOG ALPHA [X] ) + LOG ALPHA [X] + 3 )

On the Y2 line enter the expression 7-X by pressing

7 - ALPHA [X]

Press GRAPH to see the graph. To see where they intersect, press 2ND [CALC] 5. See "First curve?" in the lower left. Use up/down-arrow to select one of the two curves and press ENTER. See "Second curve?" in the lower left. Use up/down-arrow to select the other curve and press ENTER. See "Guess?" in the lower left. Press ENTER. The calculator will show the coordinates of the intersection.

Sep 19, 2012 | Texas Instruments TI-84 Plus Calculator

Press MODE 4 to switch to the BASE-N mode. Enter the base-10 number and press =. Press SHIFT [BIN] (the LOG key) to switch to base-2 and see the result.

In general, once in the BASE-N mode, to convert a number from one base to another, switch the calculator into the first base using the keys in the third row, enter the number, press =, then switch the calculator into the second base.

Press MODE 1 (or 2) to exit the BASE-N mode.

In general, once in the BASE-N mode, to convert a number from one base to another, switch the calculator into the first base using the keys in the third row, enter the number, press =, then switch the calculator into the second base.

Press MODE 1 (or 2) to exit the BASE-N mode.

Nov 14, 2010 | Casio FX-300MS Calculator

The natural log is the LN key, located just to the left of the 7 key.

To calculate the common log, use the relationship log(x) = ln(x)/ln(10).

To calculate the natural log of 3, press 3 LN

To calculate the common log of 3, press 3 LN / 1 0 LN =

To calculate the common log, use the relationship log(x) = ln(x)/ln(10).

To calculate the natural log of 3, press 3 LN

To calculate the common log of 3, press 3 LN / 1 0 LN =

Aug 09, 2010 | Texas Instruments BA-II Plus Calculator

Graph the function then use the trace function to locate the point(s) where two curves intersect. In your case one of the curves is the X-AXIS.

See the screen capture to learn how to use the trace functionality.

See the screen capture to learn how to use the trace functionality.

Feb 05, 2010 | Casio FX-7400G Plus Calculator

This is not a calculator problem. Use the rules you have learned to simplify your problem.

For a a log in any base.** log(a*b) =log(a) +log(b)** or log(a)+log(b) =log(a*b).

Thus

log(x+1)+log(x-2)= log[(x+1)*(x-2)]=1

Use the fact that log4=log in base 4 and rewrite the equation with the appropriate symbols.** log4[(x+1)*(x-2)] =1 **

However**1=log4(4)** and

l**og4[(x+1)*(x-2)]=log4(4)**

The equality of the two logs implies the equality of their arguments (contents) and

**(x+1)*(x-2) =4**

Now you solve this quadratic equation by the methods you must have learned (sorry I have to leave some thing for you to do, to ensure that proper learning is achieved).

Once you find the roots of the quadratic equation, verify that each term in your original expression has meaning-- x+1 positive and x-2 positive.

If one of the roots makes the argument (x+1) or (x-2) negative, reject it. because the argument of a log function cannot be negative.

For a a log in any base.

Thus

log(x+1)+log(x-2)= log[(x+1)*(x-2)]=1

Use the fact that log4=log in base 4 and rewrite the equation with the appropriate symbols.

However

l

The equality of the two logs implies the equality of their arguments (contents) and

Now you solve this quadratic equation by the methods you must have learned (sorry I have to leave some thing for you to do, to ensure that proper learning is achieved).

Once you find the roots of the quadratic equation, verify that each term in your original expression has meaning-- x+1 positive and x-2 positive.

If one of the roots makes the argument (x+1) or (x-2) negative, reject it. because the argument of a log function cannot be negative.

Dec 14, 2009 | Casio FX-300MS Calculator

Hello,

There is no fraction button. Any division of two integers you do is represented as a decimal number. If you want your fraction to remain a fraction you enter it as follows

**7[ / ] 19 [ MATH][1:ToFrac] [=] displays 7/19**

If you want to convert a decimal number into a proper fraction press**[MATH][1:ToFrac] .**

Exemple 7/19 [ENTER] gives .36842105. If without doing anything else, you press [MATH][1:ToFrac] you recover 7/19.

There are limitations related to the number of decimal digits in the floating point number.

.3684 [MATH][1:ToFrac][=] gives 921/2500 but

.36842 [MATH][1:ToFrac][=] gives .36842 : it is not converted to fraction.

Hope it helps

There is no fraction button. Any division of two integers you do is represented as a decimal number. If you want your fraction to remain a fraction you enter it as follows

If you want to convert a decimal number into a proper fraction press

Exemple 7/19 [ENTER] gives .36842105. If without doing anything else, you press [MATH][1:ToFrac] you recover 7/19.

There are limitations related to the number of decimal digits in the floating point number.

.3684 [MATH][1:ToFrac][=] gives 921/2500 but

.36842 [MATH][1:ToFrac][=] gives .36842 : it is not converted to fraction.

Hope it helps

Sep 16, 2009 | Texas Instruments TI-83 Plus Calculator

Press MODE 4 to enter the BASE-N mode. If the display doesn't say Dec, press SHIFT DEC (the x^2 key) to set base 10. Enter the number to convert. Press SHIFT BIN (the log key) to switch to base 2.

Each time you switch the base the current value is redisplayed in that new base.

Each time you switch the base the current value is redisplayed in that new base.

Feb 07, 2009 | Casio FX-115ES Scientific Calculator

Hello,

**From Wikipedia.**

Mathematically the experience curve is described by a power law function sometimes referred to as**Henderson's Law**:

where

If that is the law involved you enter it as follows

**60000*500[ ^ ] [(-)] 0.415 [=]** result should be 4550.705

Here

[ ^ ] is the power key, between x-square and log

[(-)] is the change sign (or negation) key in the leftmost column, just above [RCL]

Hope it helps.

Mathematically the experience curve is described by a power law function sometimes referred to as

where

- is the cost of the first unit of production
- is the cost of the
*n*th unit of production - is the cumulative volume of production
- is the elasticity of cost with regard to output[

If that is the law involved you enter it as follows

Here

[ ^ ] is the power key, between x-square and log

[(-)] is the change sign (or negation) key in the leftmost column, just above [RCL]

Hope it helps.

Dec 03, 2008 | Casio fx-300ES Calculator

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