Write a general formula to describe the variation.The square of G varies directly with the cube of x and inversely with the square of y; 
when 
and 
A. G2 = 
(x3 + y2)
B. G2 = 2 
C. G2 = 
D. G2 = 9 
Answer: C
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Determine if a correlation exists at the indicated level of significance.
? = 0.05
A. Correlation exists. B. Correlation does not exist.
Solve the problem.Find the distance in kilometers between the cities whose latitudes are given. Assume that the cities are on a north-south line and that the radius of the earth is 6400 km. City E, 39°N and city F, 9°S
A. 3343 km B. 5370 km C. 3351 km D. 5362 km
Solve the problem.The daily profit in dollars of a specialty cake shop is described by the function 
where x is the number of cakes prepared in one day. The maximum profit for the company occurs at the vertex of the parabola. How many cakes should be prepared per day in order to maximize profit?
A. 46 cakes B. 529 cakes C. 3174 cakes D. 23 cakes
Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (2
, 0) and (-2
, 0)
B. foci at (0, 2
) and (0, -2
)
C. foci at (
, 0) and (-
, 0)
D. foci at (2
, 0) and (-2
, 0)