Solve the problem.Elena is planning to enlarge a rectangular space with width = 11 ft and length = 22 ft by increasing the length x feet so that the new area is 352 ft2. How much should the length be enlarged?
A. 5 ft
B. 143 ft
C. 110 ft
D. 10 ft
Answer: D
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Solve by factoring and using the principle of zero products.49k2 = 9
A. 
, - 
B. 
, - 
C. 3, 0
D. 
, 0
Use scientific notation to solve the problem.Assume that the volume of the earth is 5 x 1014 cubic meters and the volume of a bacterium is 2.5 x 10-16 cubic meters. If the earth could be filled with bacteria, how many would it contain?
A. 2.0 x 1030 bacteria B. 1.25 x 10-2 bacteria C. 5.0 x 1031 bacteria D. 2.0 x 10-30 bacteria
Simplify.-11x5(-7x5 + 2x4 - 8)
A. 77x10 - 22x9 + 88x5 B. 77x10 - 22x9 - 8 C. 77x10 + 2x4 - 8 D. 77x5 - 22x4 + 88
Solve the problem.Tracy can wallpaper 4 rooms in a new house in 16 hours. Together with her trainee they can wallpaper the 4 rooms in 11 hours. How long would it take the trainee working by herself to do the job?
A. 56 hr B. 80 hr C. 16 hr D. 40 hr