Emily is encouraged to read more than 4 hours each week. it takes her 45 minutes to finish her first book. she divides the remainder of the time equally amongst the other six days. what is the minimum number of minutes she should read each day? write and solve an inequality.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?