Customers of a phone company can choose between two service plans for long distance calls. the first plan has a $27 monthly fee and charges an additional $0.12 for each minute of calls. the second plan has no monthly fee but charges $0.16 for each minute of calls. for how many minutes of calls will the costs of the two plans be equal?

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