Which of the following are characteristics of the normal distribution A. It is bell-shaped
B. It extends indefinitely in each direction
C. It is a symmetric distribution
D. All of the above

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step-by-step explanation:

a box 3 3/4 feet long or 4+ feet.

step-by-step explanation:

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

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