L•w•h l=8 w=31 h=20 i keep getting the answer wrong

The step function g(x) is defined as shown.what is the range of g(x)? ***answer choices in picture.

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?

Jimmy can run 3.5 miles in 20 minutes. how far can ne run in one hour and ten minutes?