Question 1202055: #Please, I need you to answer everything because I only have one question and I'm going to turn in the homework in an hour. Please.
(1) S = 47(pi)r^2, where S is the surface area of a sphere with radius r
(2) a = 1/2, where a is the area of a triangle with base b and height h
(3) Write a variation equation for each situation. Use k as the constant of variation.
(a) A varies directly as b.
(b) P varies inversely as the cube of x.
(c) I varies jointly as g and h.
(4) If x varies directly as y, and x 9 when y 3, find x when y = 12.
(5) If a varies directly as the square of b, and a = 4 when b=3, find a when b=2.
(6) If z varies inversely as w, and z = 10 when w = 0.5, find z when w = 8.
(7) If m varies inversely as the square of p, and m = 20 when p = 2, find m when p = 5.
(8) p varies jointly as q and the square of r, and p = 200 when q = 2 and r = 3. Find p when q = 5 and r = 2.
Answer by josgarithmetic(39617)   (Show Source):
You can put this solution on YOUR website! One should prepare more effectively to not lose time for reaching deadlines.
Little bit of help for #8:
p varies jointly as q and the square of r,
 ------------this is nothing fancy; just following the language of the description. And then you were given some data to allow you to solve for k.
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