Solve the problem.The area of a rectangular wall in a classroom is 210 square feet. Its length is 9 feet shorter than three times its width. Find the length and width of the wall of the classroom.
A. width = 10 ft; length = 21 ft
B. width = 10 ft; length = 37 ft
C. width = 10 ft; length = 39 ft
D. width = 10 ft; length = 19 ft
Answer: A
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When a man with a parachute jumps from an airplane, he will fall 
feet in t seconds.
?
A: Plot the graph of the graph of distance fallen versus time. Use a horizontal span of 0 to 10 seconds.
?
B: Use the calculator to estimate the value of 
at 5 seconds after he jumps from the plane. Round your answer to two decimal places.
?
C: Explain in practical terms what the number you found in part B tells us. Round your answer to two decimal places.
What will be an ideal response?
Solve the problem.A rocket is 34 feet from a satellite when it begins accelerating away from the satellite at a constant rate of 20 feet per second per second. The distance, in feet, between the rocket and the satellite is modeled by 
where t is the number of seconds since the rocket started accelerating. Use the model to find and interpret the result when t = 9.
A. When t = 9, P = 844; After 9 seconds, the distance between the rocket and the satellite is 844 feet. B. When t = 115, P = 9; After 115 seconds, the distance between the rocket and the satellite is 9 feet. C. When t = 124, P = 9; After 124 seconds, the distance between the rocket and the satellite is 9 feet. D. When t = 9, P = 810; After 9 seconds, the distance between the rocket and the satellite is 810 feet.
Multiply and simplify if possible.
(
+ 
)
A. 
+ 
B. 
+ 
C. 17 + 
D. 51
Graph the solution of the quadratic inequalities on a number line and write the solution in interval notation. s2 - 2s - 3 < 0
A. (3, ?)
B. (-?, -1)
C. (-?, -1) ? (3, ?)
D. (-1, 3)