The musical the students are perorming contains 9 songs. if mr. barnes wants 10 students to sing each song, how many students will get to sing more than 1 song?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

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.