If you have 5 chapters with 10 lessons in each how many lessons and chapters would you need to be through to be at 50%?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

What is the percentile for data value 6 in the following data set? 4 13 8 6 4 4 13 6 4 13 2 13 15 5 9 4 12 8 6 13 40 25 35 62

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)