Grace spends $0.33 to buy a new pen she pays back with a $1 bill how much change should Grace get back

Can someone me with these two circle theorem questions asap?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?