Find the value(s) of the variable for which the rational expression is undefined.

A. none
B. -9
C. 0
D. 9


Answer: D

Mathematics

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A. True B. False

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Solve the problem.A projectile is fired with an initial velocity of 500 feet per second at an angle of 70° with the horizontal. To the nearest 10 feet, find the horizontal distance covered by the projectile. The parametric equations for the path of the projectile are x = (500 cos 70°)t, and 

A. 5130 ft B. 5020 ft C. 5260 ft D. 4880 ft

Mathematics