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## anonymous 5 years ago A rectangle has area 49 m2. (a) Express the perimeter of the rectangle as a function of the length (L) of one of its side. Part (a) = 2L + 98/L (b) State the domain = ?

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1. anonymous

domain is L>0

2. anonymous

were you supposed to derive a) or just assume it?

3. anonymous

yeah i found a)

4. anonymous

ok well since it is a rectangle the length has to be positive.

5. anonymous

so its 0 to infinity ?

6. anonymous

or does it have to be less than 49

7. anonymous

no it doesn't have to be less than 49 i don't think. you just must have LW = 49 so at least in theory L could be say 1,000,000 making W $\frac{49}{1000000}$

8. anonymous

your perimeter in this problem is not fixed. if it was then you would have a restriction on L

9. anonymous

so then its (0, infinity)

10. anonymous

that is what i would say, yes.

11. anonymous

THANKS

12. anonymous

welcome

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