What is the fraction of the items are round

Acircle has a radius of 12.6cm what is the exact length of an arc formed by a central angle measuring 120

What is the equation of the parabola with focus (-1,-1) and directrix y=1?

Of the following, which statement or statements accurately reflect a way in which credit can be safer than cash? i. if your credit card gets stolen, you can cancel it and get your money back. ii. it is harder to lose a single credit card than a large number of bills. iii. if a merchant does not honor the agreement, you can call the credit company and dispute the charges. a. i and iii b. ii only c. iii only d. i, ii, and iii