Find the focus and directrix of the parabola with the given equation.5y2 = -4x
A. Focus: 
, directrix: y = 
B. Focus: 
, directrix: y = 
C. Focus: 
, directrix: x = 
D. Focus: 
, directrix: x = - 
Answer: C
Mathematics
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Use a calculator (in radian mode) to evaluate the given expression.sin(tan-1 2)
A. 0.8944 B. 1.1180 C. 0.4472 D. 1.5708
Mathematics
Solve the problem.Find the height of the cliff. Round to the nearest hundredth of a meter when appropriate. 
A. 33.54 m B. 51.31 m C. 15 m D. 32.63 m
Mathematics
Simplify the fraction, if possible.
A. undefined
B. 
C. -8
D. 8
Mathematics
Solve the problem.If a rocket is propelled upward from ground level, its height in meters after t seconds is given by 
. During what interval of time will the rocket be higher than 235.2 m?
A. 0 < t < 4 B. 6 < t < 8 C. 8 < t < 10 D. 4 < t < 6
Mathematics