Solve the problem.If an object is propelled upward from a height of 48 feet at an initial velocity of 32 feet per second, then its height h after t seconds is given by the equation 
After how many seconds does the object hit the ground?
A. 11 sec
B. 3 sec
C. 2.0 sec
D. 1.5 sec
Answer: B
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local maximum at x = 3; local minimum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3) B. Local minimum at x = 3; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0) C. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3) D. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0)
Perform the indicated operations. Write the answer in the form a + bj.
+ 0.318j - 
A. -0.417 - 2.062j B. 0.417 - 1.426j C. 0.417 + 1.426j D. -0.417 - 1.426j
Graph and write in interval notation.x ? -4 or -x > -1
A. [-4, 1)
B. (-?, ?)
C. (-?, -4] ? (1, ?)
D. ?
Write the fraction in simplest form.
A. 
B. 
C. 
D. 