Solve the inequality.x2 - 4x - 21 ? 0
A. x ? -3
B. -3 ? x ? 7
C. x ? -3 or x ? 7
D. x ? 7
Answer: B
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Provide an appropriate response.Find any local extrema (maxima, minima, or saddle points) of 
given that 
and 
A. Local minimum at 
B. Local maximum at 
C. Local maximum at 
D. Saddle point at 
Solve.A garden has vegetables planted in a 38-ft by 23-ft area. The vegetables are surrounded by a 2-ft border of flowers. By what percent is the area for planting vegetables increased if the 2-ft border of flowers is removed? Round to the nearest whole percent.
A. 31% B. 13% C. 14% D. 30%
Given that the polynomial function has the given zero, find the other zeros.f(x) = x3 - 4x2 + 9x - 10; 2
A. -1 + 2i, -1 - 2i
B. 1 + 
, 1 - 
C. 1 + 
i, 1 - 
i
D. 1 + 2i, 1 - 2i
If the sides of a triangle are a, b, and c and they satisfy a2 + b2 = c2, the triangle is a right triangle. Determine whether the triangle with the given sides is a right triangle.a = 3, b = 4, c = 5
A. Yes B. No