Write the percent statement in basic percent form.21 of 2100 is 1%.
A. 21 of 2100 is 1%
B. 1% is 21 of 2100
C. 2100 of 21 is 1%
D. 1% of 2100 is 21
Answer: D
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Describe the graph of the polar equation.r cos ? = 13
A. Circle centered at origin with radius 13 B. Horizontal line through (0, 13) C. Line with slope 13 passing through the origin D. Vertical line through (13, 0)
Provide an appropriate response.It can be shown that a hyperbola with center at the origin, foci at F'(-c, 0) and F(c, 0), and equation 
has equation 
. Use this result to find an equation of a hyperbola with center at the origin, foci at (-6, 0) and (6, 0), and absolute value of the distances from any point of the hyperbola to the two foci equal to 6.
A. x2 - y2 = 6
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve the following system by any appropriate method. If there is no real number solution, so state.y2 + 3x2 = 37y2 - x2 = 1
A. (3, -
), (3, 
)
B. (4, 
), (4, -
), (-4, 
), (-4, -
)
C. (3, 
), (-3, 
)
D. (3, 
), (3, -
), (-3, 
), (-3, -
)
Solve the problem.A rectangular piece of cardboard measuring 15 inches by 29 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. For what value of x will the volume be a maximum? If necessary, round to 2 decimal places.
A. 3.15 in. B. 23.04 in. C. 11.52 in. D. 13.79 in.