I need help with this

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

52 cm radius = diameter = area = circumference = circumfer