When calculating the successive discounts of 15% and 10% on a $100 item
a take 10% of $85
b. take 10% of $90
c take 15% of $85
à take 25% of $100

chiken

step-by-step explanation:

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