An engineer is planning a new water pipe installation. The circular pipe has a diameter of d = 20 cm d=20 cmd, equals, 20, start text, space, c, m, end text. What is the area A AA of the circular cross section of this pipe? Give your answer in terms of pi

Acable company claims that the average household pays $78 a month for a basic cable plan, but it could differ by as much as $20. write an absolute value inequality to determine the range of basic cable plan costs with this cable company. a. |x − 78| ≥ 20 b. |x − 20| ≥ 78 c. |x − 20| ≤ 78 d. |x − 78| ≤ 20