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Almost embarassed, but I cannot seem to get the same answer that is posted here...I keep getting .922, yet posted answer is .83.

can someone help me out here? I am told the answer to the equation below is 0.8310, yet every permutation I try to put into my TI-84 returns a value of .9227888

X = e^(((log315-log1200)/log150)*log2)

I am at my wits end and would appreciate any help.

user857258
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    Is the $\log$ in base $10$ or base $e$? The latter gives $0.831$, see WolframAlpha. Click "use the base 10 logarithm instead" to get the other answer. – player3236 Dec 04 '20 at 17:54
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    Your calculation used log to base 10, but you need log to the base e (probably "ln") on the calculator – Matthew Towers Dec 04 '20 at 17:56
  • I am new on this site, so it will not allow me to post screen grabs, but the original equation is this 315=1200*150^(logx/log2) – user857258 Dec 04 '20 at 18:09
  • @jer Can you convert the math equation to MathJax? Here is the guide, and https://www.desmos.com/calculator is a powerful software for copy-pasting formatted TeX – Anindya Prithvi Dec 04 '20 at 18:11
  • thank you both, I appreciate your response and I figured it out thanks to your insight, much appreciated – user857258 Dec 04 '20 at 18:17
  • In the "original equation" the base of the $\log$ does not matter. If you use "log" on a calculator, its default base is $10$. So either you use the "ln" button on the calculator, or change to X = 10 ^(((log315-log1200)/log150)*log2) instead of using base $e$. – player3236 Dec 04 '20 at 18:19

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