Solve the problem.A one-story office building is 40 feet by 80 feet. If a square patio with sides of 21 feet occupies the center of the building, how much area remains for offices?
A. 240 sq. ft
B. 156 sq. ft
C. 219 sq. ft
D. 2759 sq. ft
Answer: D
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For what values of x does the series converge conditionally?
A. x = -3 B. x = -3, x = -1 C. x = -1 D. None
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.tan ? = 
, ? < ? < 
Find sin 
.
A. - 
B. - 
C. 
D. 
Find the slope and y intercept of the graph of the equation.y = 3x - 4
A. Slope = 4, y intercept = 3 B. Slope = 3, y intercept = 4 C. Slope = 3, y intercept = -4 D. Slope = -4, y intercept = 3
Solve.A plane flying with a tailwind flew at a speed of 420 mph, relative to the ground. When flying against the tailwind, it flew at a speed of 300 mph. Express these relationships as equations. Let x represent the speed of the plane in calm air and let y represent the speed of the wind.
A. x + y = 420 y = 300 B. x + y = 300 x - y = 420 C. x + y = 300 y = 420 D. x + y = 420 x - y = 300