Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the semicircle y = 
A. 
= 
, 
= 0
B. 
= 0, 
= 
C. 
= 
, 
= 
D. 
= 0, 
= 
Answer: B
Mathematics
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Find an equation for the line tangent to the curve at the point defined by the given value of t.x = 5 sin t, y = 5 cos t, t = 
A. y = x - 5
B. y = - x + 5
C. y = 5
x + 1
D. y = 5x + 5
Mathematics
Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 29, whole = 29
A. percent = 200% B. percent = 0% C. percent = 1% D. percent = 100%
Mathematics
Solve for x. Check your answer. If there is no solution, say so.
= 
A. x = 
B. x = 780
C. x = 
D. x = 
Mathematics
Find the equation for the hyperbola described.Center at (0, 0); focus at (-
, 0); vertex at (-7, 0)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics