Amy works at a surf shop at the beach during the summer. She is paid at a rate of $4 each hour, plus she earns 7% commission on each sale that she makes,
Which equation correctly represents Amy's total income () in terms of (h) how many hours she works
and (s) how much she sells?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.