pre-calc problems..urgent please


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Posted by moon on August 28, 2002 at 18:56:55:

hi..i'm trying to do these problems...i don't know how to go out these because the teacher did not go over them in class. i would appreciate if somebody could help me here or email me. here they are:

Express the area of a circle as a function of its a) diameter b) circumference. Show all work. Explain how each formula works.

p(t)= 19.247+ 1.694t -6< t < -1
(there's suppose to be line underneath both < )

19.305+0.427t+0.033t2
( suppose to be t squared) 0 (same thing, line under < )

p(t) represents the average price of a mobile home.

i need a somewhat quick response if anybody can...thanks


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