- Thread starter yorkmanz
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what is this?I would use the conversion factor:

\(\displaystyle x\text{ ft}=x\text{ ft}\cdot\frac{12\text{ in}}{1\text{ ft}}\cdot\frac{2.54\text{ cm}}{1\text{in}}=\frac{762}{25}x\text{ cm}=30.48x\text{ cm}\)

8x12+6=102 in

102*2.540=259.08 cm

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Yes:what is this?

8x12+6=102 in

102*2.540=259.08 cm

\(\displaystyle 30.48\cdot8.5=259.08\)

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Look at the beginning and the end. It clearly says x ft = 30.48x cmwhat is this?

8x12+6=102 in

102*2.540=259.08 cm

Since you have 8.5 ft, it says that 8.5 ft = 30.48*8.5 cm

Or are you suggesting that MarkFL or others just give you the answer? This is a math help site where we help students arrive at the answer on their own vs a site where they just supply you with the answer.

MarkFL derived the formula for you so that you can use it whenever you want, even if you forget it (since you now know how to derive it)

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Back in the stone age, when I was in school, it was called the "dimensional unit method".what is this?

Thanks much i appreciate ur help...I would use the conversion factor:

\(\displaystyle x\text{ ft}=x\text{ ft}\cdot\frac{12\text{ in}}{1\text{ ft}}\cdot\frac{2.54\text{ cm}}{1\text{in}}=\frac{762}{25}x\text{ cm}=30.48x\text{ cm}\)