Determine whether the equation is a function.x2 + 2y2 = 1
A. function
B. not a function
Answer: B
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Solve the problem.The function A described by A(r) = 4?r2 gives the surface area of a sphere with radius r. Find the area when the radius is 4 in. Round your answer to two decimal places.
A. 50.27 in.2 B. 201.06 in.2 C. 64 in.2 D. 150.8 in.2
Find all possible solutions to the problem.A rectangle has an area of 42 in2. Its length and width are whole numbers. What are the possibilities for the two numbers?
A. 2 and 21, 3 and 14 , 6 and 7 B. 1 and 42, 2 and 28, 3 and 14, 6 and 7 C. 1 and 42, 2 and 21, 3 and 14 , 4 and 8, 6 and 7 D. 1 and 42, 2 and 21, 3 and 14 , 6 and 7
Fill in the missing coordinate in each ordered pair so that the pair is a solution to the given equation.y = 2x
, 
, 
, 
A. 
, 
, 
, 
B. 
, 
, 
, 
C. 
, 
, 
, 
D. 
, 
, 
, 
Solve the problem.Find the dimensions of a box with largest volume if it lies in the first octant, three of its faces lie in the coordinate planes, and the box lies beneath (or touching) the ellipsoid with equation 
A. 
by 
by 
B. 1 by 
by 
C. 
by 2
by 
D. 3
by 4
by 7