The height in feet 
of a rocket in flight is given by the formula 
, where 
is the time of the flight in seconds. How long will it take for the rocket to hit the ground?
A. 7 sec
B. 8 sec
C. 10 sec
D. 6 sec
E. 5 sec
Answer: B
Mathematics
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Evaluate the indicated power of i.i-26
A. -i B. 1 C. -1 D. i
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Simplify the radical.
A. 
B. 6
C. 
D. 
Mathematics
Solve the problem.A zoom lens in a camera makes a rectangular image on the film that is 5 cm × 3 cm. As the lens zooms in and out, the size of the image changes. Find the rate at which the area of the image begins to change (dA/df) if the length of the frame changes at 0.8cm/s and the width of the frame changes at 0.4 cm/s.
A. 
m2/2
B. 5.2 m2/s
C. 4.4 m2/s
D. 1.4667 m2/s
Mathematics
Convert to decimal notation.6.45 × 104
A. 645,000 B. 258 C. 64,500 D. 6450
Mathematics