Solve the problem, using 3.14 for ?. Round to nearest tenth unless instructed differently.A rubber ice-hockey puck has a 3.0 in. diameter. What is the surface area of one flat side of the puck?
A. 9.4 in.2
B. 28.3 in.2
C. 3.5 in.2
D. 7.1 in.2
Answer: D
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Determine the amplitude or period as requested.Period of y = 
cos 
A. 
B. 
C. 
D. 
A and B are invertible matrices. Find the expression equivalent to the following.
?
?
A. 
B. 
C. 
D. 
E. none of these
Fill in the blank with one of the symbols =, <, or > to produce a true statement.- 
?-14
A. < B. > C. =
Rotate the axes so that the new equation contains no xy-term. Discuss the new equation.xy +16 = 0
A. ? = 45°
- 
= 1
hyperbola
center at (0, 0)
transverse axis is y'-axis
vertices at (0, ±4
)
B. ? = 45°
+ 
= 1
ellipse
center at (0, 0)
major axis is y'-axis
vertices at (0, ±4
)
C. ? = 45°
y'2 = -32x'
parabola
vertex at (0, 0)
focus at (-8, 0)
D. ? = 36.9°
+ 
= 1
ellipse
center at (0, 0)
major axis is the x'-axis
vertices at (±2, 0)