Solve the problem.A painter leans a 21 foot ladder against one wall of a house. At what height does the ladder touch the wall if the foot of the ladder is 15 ft from the base of the wall?
A. ? 2.4 ft
B. ? 108 ft
C. ? 14.7 ft
D. ? 25.8 ft
Answer: C
Mathematics
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Find the area of the specified region.Inside the circle r = 2 cos ? + 9 sin ?
A. 
B. 
+ 9
C. 9?
D. 
Mathematics
Find the exact value of the expression.sec-1
A. 
B. 
C. - 
D. 
Mathematics
Find the vertex, focus, and directrix of the parabola. Graph the parabola.y2 - 6y + 12x + 93 = 0
A. vertex: (3, -7)
focus: (3, -4)
directrix: y = -10
B. vertex: (-7, 3)
focus: (-10, 3)
directrix: x = -4
C. vertex: (-7, 3)
focus: (-4, 3)
directrix: x = -10
D. vertex: (3, -7)
focus: (3, -10)
directrix: y = -4
Mathematics
Multiply.(7.1)(8.7)
A. 0.6177 B. 6.177 C. 617.7 D. 61.77
Mathematics