exam Maths Puzzle Numerical Ability

Please help me solve this problem: The graph of a^2 + 8a + 16 is?
Thank you!

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exam Other Question

if a single roll of wallpaper will cover 3 square meters, how many single rolls will it take to cover a will 2 meters x 5 meters? For the following probability distribution μ =
xi| 250 300 400
pi| 0.30 0.50 0.20

a. 0.50
b. 300
c. 305
d. 317