What is the period of the sinusoidal function?

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?

Which of the following best describes the figure?

The function below show how much jayna and hannah charge for babysitting. which statement best compares the two plants?