The radius of a bicycle tire is 9 inches. Which of the following equations can be used to find the tire's circumference, C, in inches? Choose all that apply.

C = 9 × pi

C = 18 × pi

C = 92 × pi

C = 2 × 9 × pi

C = 2 × 18 × pi

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!