Which number is not in scientific notation? A. 7.8 • 10^6
B. 1.45 • 10^-7
C. 0.33 • 10^-15
D. 9• 10^19

C is not in scientific notation

Step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11

answer by yourhope:

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