Given f of x equals 5 times x minus 6 for x less than 2, equals x squared for x between 2 and 4 inclusive, and equals 2 times x plus 8 for x greater than 4 find f '(x) and give its domain Pls give thurough answer

Acity plans to build a new rectangular-shaped park. the perimeter of the park will be 940 meters. the width of the park will be 300 meters. what will be the length, in meters, of the new park?

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?

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?