The area, A, of a circle varies as the square of its radius, radius, r, and r = 7 cm when A = 154 cm I) A when r = 14 cm
II) r when A = 38.5 cm

How do you solve a question like this?

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Measure of angles 31 (x+4) (3x+9) me