The circle shown below has ab and bc as its tangents: ab and bc are two tangents to a circle which intersect outside the circle at a point b. if the measure of arc ac is 120°, what is the measure of angle abc? a) 60° b) 70° c) 40° d) 65°

it would be:   180-120 = 60

'cause internal & external make 180 degree of angle in total.

the answer is 60

the two may have that, even a breakdown is probably offered

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.