So t' is adjusted time with new filtration and t = current exposure time

The dots signify multiplication and the line is division but in what order would the sum be done as I cannot seem to get any where near the answer in the example?

Thank you

- Thread starter Klang
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So t' is adjusted time with new filtration and t = current exposure time

The dots signify multiplication and the line is division but in what order would the sum be done as I cannot seem to get any where near the answer in the example?

Thank you

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What answer/s did you get?You said, "I cannot seem to get any where near the answer..."

Please show your **work **in getting those answer/s.

Hi,What answer/s did you get?

Please show yourworkin getting those answer/s.

Well if I take the top row for example and multiply them i.e. 1.17x2.01x1.00 and then do the same for the bottom 1.14 etc, then divide the totals of each. But that doesn't take into account the time etc

Or is it t i.e. 10 x 1.17 divided by 1.14

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PleaseHi,

Well if I take the top row for example and multiply them i.e. 1.17x2.01x1.00 and then do the same for the bottom 1.14 etc, then divide the totals of each. But that doesn't take into account the time etc

Or is it t i.e. 10 x 1.17 divided by 1.14

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Don't be embarrassed.Well this is embarrassing......

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Yes, of course- your equation clearly says t times the fraction \(\displaystyle \frac{km'\cdot ky'\cdot kc'}{km\cdot ky \cdot kc}\) and each example, with t= 10, shows 10 times the fraction.Hi,

Well if I take the top row for example and multiply them i.e. 1.17x2.01x1.00 and then do the same for the bottom 1.14 etc, then divide the totals of each. But that doesn't take into account the time etc

Or is it t i.e. 10 x 1.17 divided by 1.14

Thank you got it.Yes, of course- your equation clearly says t times the fraction \(\displaystyle \frac{km'\cdot ky'\cdot kc'}{km\cdot ky \cdot kc}\) and each example, with t= 10, shows 10 times the fraction.

10x(1.17x2.01x1.00)

I guess to expand on that so the above gives me the correct answer when inputted into a scientific calculator but out of interest in what order would this equation be performed when using a non scientific calculator i.e. written by hand or with a calculator without the brackets function. Does that question make sense?

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You may do it as follows:Thank you got it.

10x(1.17x2.01x1.00)÷(1.14x1.69x1.00)=12.20 Seconds

I guess to expand on that so the above gives me the correct answer when inputted into a scientific calculator but out of interest in what order would this equation be performed when using a non scientific calculator i.e. written by hand or with a calculator without the brackets function. Does that question make sense?

1.17*2.01 = 2.3517

2.2517*1 = 2.3517

2.3517 / 1.14 = 2.0628947368421

2.06289 / 1.69 = 1.2206449704142

and so on....

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Since only multiplication and division are involved, the orderThank you got it.

10x(1.17x2.01x1.00)÷(1.14x1.69x1.00)=12.20 Seconds

I guess to expand on that so the above gives me the correct answer when inputted into a scientific calculator but out of interest in what order would this equation be performed when using a non scientific calculator i.e. written by hand or with a calculator without the brackets function. Does that question make sense?

If there were multiplications mixed with additions, then using "

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Just be careful with those divisions - without parentheses.Since only multiplication and division are involved, the orderdoesn't matter!a

If there were multiplications mixed with additions, then using "PleaseExcuseMyDearAuntSally" or "PEMDAS", 'parentheses", "exponents", "multiplication", "division", "addition", "subtraction", you would do all multiplications before the additions.