Rearrange the formula a = v^2/ r for v

Isolate the v.

a = v^2/2

First multiply 2 to both sides

a(2) = v^2/2(2)

2a = v^2

Isolate the v, root both sides

√2a = √v^2
✓2a = v

✓2a = v should be your answer

Hope this helps

Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.