Find the trigonometric function value of the corresponding complimentary angle.Given that sin 40° ? 0.6428, find cos 50°
A. 0.8391
B. 0.7660
C. 0.6428
D. 1.305
Answer: C
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Solve the problem.At time t, the position of a body moving along the s-axis is 
m. Find the body's acceleration each time the velocity is zero.
A. a(2) = -18 m/sec2, a(8) = 18 m/sec2 B. a(2) = 0 m/sec2, a(8) = 0 m/sec2 C. a(2) = 18 m/sec2, a(8) = -18 m/sec2 D. a(4) = 24 m/sec2, a(16) = 4 m/sec2
Solve the linear equation.
x = 2 + 
A. {60} B. {30} C. {-60} D. {-30}
Find all values of x satisfying the given conditions.y1 = 
, y2 = 
, and y1 + y2 = 
A. 
B. 
C. 
D. 
Solve the problem.The equation y = 0.002x - 0.30 can be used to determine the approximate cost, y in dollars, of producing x items. How many items must be produced so the cost will be no more than $387?
A. 0 < x ? 193,350 B. 0 < x ? 193,651 C. 0 < x ? 193,650 D. 0 < x ? 203,332.50