I am in need of help :) please and thank you :):

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

Simplify (2^5/3^2)^4 a. 2^20/3^8 b. 2^9/3^8 c. 8^5/12^2 d. 2/3^2