Solve the problem.A ball is thrown vertically upward from the top of a building 112 feet tall with an initial velocity of 96 feet per second. The distance s (in feet) of the ball from the ground after t seconds is 
After how many seconds does the ball strike the ground?
A. 113 sec
B. 7 sec
C. 6 sec
D. 9 sec
Answer: B
Mathematics
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?
Find the cofactor A12 of the matrix.
?
A. 
B. 
C. 
D. 
E. none of these
Mathematics
The graduates at a southern university are shown in the table. 
A student is selected at random from the graduating class.Find the probability that the student is female, given that an education degree is not received, P(F|E').
A. P(F|E') = 
B. P(F|E') = 
C. P(F|E') = 
D. P(F|E') = 
Mathematics
Determine whether the pair of lines is parallel, perpendicular, or neither.y = - 
x + 7y = 
x + 7
A. Parallel B. Perpendicular C. Neither
Mathematics
Solve the equation. Express irrational answers in exact form and as a decimal rounded to 3 decimal places.
x = 71 - x
A. ln 
- ln 7 ? -1.030
B. 
? 0.680
C. 
? 1.347
D. 
? 1.471
Mathematics