Question about Texas Instruments TI-30XA Calculator

# Reposting! exponential and log equations

I just posted this question, the equation is actually   LN4 divided by LN4-2LN3
how do i put this in the calculator?

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Use this entry sequence:

4 LN / ( 4 LN - 2 X 3 LN ) =

or this one which evaluates the divisor first

4 LN - 2 X 3 LN = 1/x X 4 LN

Posted on Dec 31, 2008

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I think the problem with this equation comes when x = 0. At this point, it is undefined. Thus, it is a horizontal line y=-2, except when x=0. This is normally signified by putting an open circle when x=0.

I hope I answered you question. If not, repost.

Good luck,

Paul

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Sorry but you are using the word EQUATION incorrectly. All you have is two numbers you want to divide one by the other.
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### I am trying 0.037 Amps to milliamperes by useing the x10x button i am preety sure i should press 0.037x10-3 but the answer comes up 37/1000000 when the answer should be 37 not sure if the calculators set...

Prefixes such as milli already reflect the corresponding multiplier or divisor. One milliamp is 1/1000th of an Amp, so 37 milliamps = 0.037 of an Amp.

To keep two sides of an equation the same, you need to perform the same operation on each side. In this case, the equation is 37/1000 = 0.037. The "divide by 1000" part of this equation is included in the word "milliamp", hence 37 milliamps = 0.037 Amps.

Another way of looking at it is that a number remains unchanged if you both divide and multiply it by the same number. In this case, changing to milliamps is dividing by 1000, so you need to multiply by 1000 to keep the result unchanged.

You have actually divided by 1000 twice as a result of using x10^-3 as a multiplier when you should have used x10^3

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Definition

A mathematical statement used to evaluate a value. An equation can use any combination of mathematical operations, including addition, subtraction, division, or multiplication. An equation can be already established due to the properties of numbers (2 + 2 = 4), or can be filled solely with variables which can be replaced with numerical values to get a resulting value. For example, the equation to calculate return on sales is: Net income ÷ Sales revenue = Return on Sales. When the values for net income and sales revenue are plugged into the equation, you are able to calculate the value of return on sales.

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I hope this helps you out.

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