Solve the problem.The position of an object moving in a straight line is given by s = t2 - 8t, where s is the distance in feet and t is the time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to move 19 feet?
A. 20.0 sec
B. 20.9 sec
C. 9.7 sec
D. 9.9 sec
Answer: D
Mathematics
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Perform the indicated operations, and write the answer in scientific notation.
A. 2 × 104 B. 2 × 106 C. 2 × 10-5 D. 2 × 107
Mathematics
Use a calculator to approximate the root to the nearest thousandth.
A. -2.565 B. -2.595 C. -2.577 D. -2.586
Mathematics
Simplify.9x - (7 - 2x)
A. 7x - 7 B. 9x - 9 C. 11x - 7 D. 11x + 7
Mathematics
Solve the problem.Write an expression for the perimeter of the figure shown. Then simplify the expression. All measures are in inches. 
A. 36 in.
B. 2
+ 2
in.
C. 4 
+ 4
in.
D. 9 + 2
in.
Mathematics