Are g(x)=13x-13 and h(x)=1/13x-1 inverse functions

no not all of them.

step-by-step explanation:

some of them have a square base.

the answer is b

we know that

1) the inscribed angle measures half of the arc it comprises.

so

m∠dgf= > expression

2) the opposite angles in an inscribed quadrilateral are supplementary angles

so

m∠dgf=

m∠dgf=°

substitute in the expression to find the value of arc ef

therefore

the answer is

the measure of the arc ef is