Pls help According to Descartes' rule of signs, how many possible positive real roots could the following polynomial function have? f(x)=3x^4-5x^3+5x^2+5x-2 A. Four

B. Three or one

C. Three

D. Two or zero

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step-by-step explanation:

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh