Which point on the line represents -1/3 please help me figure this out

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Does the point (1, sqrt 7) lie on circle shown.