If is a perfect square, find the positive value of the constant
8
Context: For a quadratic expression to be a perfect square, its discriminant must equal zero ():(-k)^2 - 4(1)(16) = 0 \implies k^2 - 64 = 0$$$$k^2 = 64 \implies k = \sqrt{64} = 8
Grammar: Change the sentence from direct to indirect : He said, "I am happy"
TOEFL iBT Choose the structure that best completes the sentence: Not only _______ beautiful, but it is also highly functional.
Express in standard scientific form correct to 3 significant figures
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