Find the open interval(s) where the function is changing as requested.Increasing; y = x4 - 18x2 + 81
A. (-3, 0), (3, ?)
B. (-3, 0)
C. (-3, 3)
D. (-?, 0)
Answer: A
Mathematics
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Find all real numbers that satisfy the equation. Round approximate answers to 2 decimal places.3 = 5 cos(x) + 2
A. 0.98 + 2k? or 5.30 + 2k? where k is any integer B. 1.37 + k? or 4.91 + k? where k is any integer C. 1.37 + 2k? or 7.65 + 2k? where k is any integer D. 1.37 + 2k? or 4.91 + 2k? where k is any integer
Mathematics
Change the polar coordinates (r, ?) to rectangular coordinates (x, y).(4, 225°)
A. (-2
, -2)
B. (-2, -2
)
C. (2
, 2)
D. (2, 2
)
Mathematics
Multiply.8 ? 4(3y)
A. 86y B. 96y C. 96 D. 196y
Mathematics
Write an equation of the circle with the given center and radius.(0, 5); 3
A. x2 + (y + 5)2 = 3 B. (x + 5)2 + y2 = 9 C. x2 + (y - 5)2 = 9 D. (x - 5)2 + y2 = 9
Mathematics