Solve the problem.The height of a frisbee thrown is given by 
, where x is the time traveled in seconds. The frisbee is released at a height of 
At what time will the height of the frisbee be 
again? (Round answer to the nearest tenth of a second, if necessary.)
A. 5.1 sec
B. 10.1 sec
C. 12.5 sec
D. The height of the frisbee will never be 3 feet again.
Answer: B
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A computer password is made up of five characters. Each character can be a capital letter (A through Z) or a digit (0 through 9).How many passwords have three letters and two digits?
A. 263 × 102 B. 10 × 263 × 102 C. 26 × 25 × 24 × 10 × 9 D. 3 × 263 × 102 E. none of these
Determine all solutions of the equation in radians.Find cos 
, given that sin ? = 
and ? terminates in 0 < ? < 90°.
A. 
B. 
C. 
D. 
Find the length of the third side of the right triangle. Assume that c represents the length of the hypotenuse. Give an exact answer and, if appropriate, an approximation to three decimal places.a = 1, b = 7
A. c = 8
B. c = 
; c ? 7.071
C. c = 
; c ? 2.828
D. c = 
; c ? 6.928
Determine whether the given linear equations are parallel, perpendicular, or neither.-x + 
y = 
x - 
y = 
A. parallel B. perpendicular C. neither