Bonjour pouvez vous m’aidez pour se devoir svp

The circumference of a circle is 60 pi cm3what is the radius of the circle

The class wants to raise a total of $750.if they receive a profit of $1.25 from each candybar sold, how many bars must they sell to reachtheir goal

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9