Solve.A rock falls from a tower that is 107.8 m high. As it is falling, its height is given by the formula 
How many seconds will it take for the rock to hit the ground (h=0)? Round to the nearest tenth.
A. 2400 sec
B. 10.4 sec
C. 22.1 sec
D. 4.7 sec
Answer: D
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Solve the problem.Construct a product table showing all possible two-digit numbers using digits from the set {1, 2, 6, 7}. List the square numbers in the table.
A. {4, 9} B. {16, 22} C. {16} D. none
Write each whole number in expanded form.587
A. 700 + 80 + 5 B. 58,700 C. 500 + 80 + 7 D. 5000 + 800 + 70
If t represents the number of hours after 9:30 A.M. on Tuesday, October 5, 2004, then the graph defines the Dow Jones Industrial Average D as a function of time t. If we represent this function by 
use the graph to find f(6.5).
?
?
Source:Bloomberg Financial Markets, The New York Times,October 6, 2004. Copyright © 2004 The New York Times Co. Reprinted by permission.
?
A. 10,220
B. 10,175
C. 10,217
D. 10,160
E. 10,190
Find all specified roots.Cube roots of 1.
A. 1, - 
+ 
i, - 
- 
i
B. -1, 1
C. 1, 
+ 
i, - 
+ 
i
D. 1, 
- 
i, - 
- 
i