What is the greatest common factor of 7ab and 8b^3

Acircle has a circumference of 2 pi cm. which statement about the circumference and area is true? a comparison of the area and circumference is not possible since the area cannot be determined. the numerical values of the circumference and area of the circle are equal. the numerical value of the circumference is greater than the numerical value of the area. the numerical value of the circumference is less than the numerical value of the area.

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

What is the value of x? assume that the line is tangent to the circle.