When we combine the even numbers and the odd numbers, we get which set of real numbers?
A) natural numbers
B) integers
C) negative real numbers
D) rational numbers
E) irrational numbers
B) integers
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Evaluate or simplify the given expression.cos-1 
A. 
B. 
C. 
D. 
Graph the ellipse. Label the intercepts.50x2 + y2 = 100
A. (-
, 0), (
, 0), (0, -
), (0, 
)
B. (-2, 0), (2, 0), (0, -10), (0, 10)
C. (-2, 0), (2, 0), (0, -
), (0, 
)
D. (-
, 0), (
, 0), (0, -10), (0, 10)
Solve the problem.The magnitude and direction of two forces acting on an object are 35 pounds, 
, and 55 pounds, S30°E, respectively. Find the magnitude, to the nearest hundredth of a pound, and the direction angle, to the nearest tenth of a degree, of the resultant force.
A. 
= 49.17; ? = -11.3°
B. 
= 57.04; ? = -23.6°
C. 
= 43.30; ? = 2.7°
D. 
= 65.19; ? = -7.5°
Solve the problem.A bridge is built in the shape of a parabolic arch. The bridge arch has a span of 154 feet and a maximum height of 30 feet. Find the height of the arch at 20 feet from its center.
A. 28 ft B. 0.5 ft C. 34.2 ft D. 8.1 ft