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# Biologists have found that the weight W of a bird and the length

Biologists have found that the weight W of a bird and the length L of its wing span are related by L=kW^1/3, where k is a constant. The W(kilograms) is 0.1 and the L (meters) is 0.427. approximate the value of K. Then - find the wing span of a 0.90-kilogram bird using L=0.92(0.90)^1/3

David :

hello

David :

here is the solution

David :

k = L/W^(1/3) = 0.427/0.1^(1/3)=0.9199

David :

and now using this value of K we get

David :

L = 0.9199*0.9^(1/3)=0.888

David :

Customer:

You helped me yesterday by telling me of using the Excell cell to get a solution to (0.1)^1/3. which I did , HOW did we get the 0.888????? I get a number like .276.......

David :

same logic

David :

opwn Excell

David :

and in any cell just type this:

David :

=0.9199*0.9^(1/3)

David :

then press ENTER

David :

and you'll see the answer of 0.888

David :

:-)

David :

eas, right?

Customer:

oh, I think i see my error....i put the parentheses in the wrong place

Customer:

good grief, such a silly error. This algebra is giving me a headache. Thank you once again for your assistance David.

David :

you are welcome