a parachute design uses 18 separate pieces of rope. each piece of rope must be at least 270 centimeters and no more than 280 centimeters long. what inequality represents all possible values of the total length of rope x, in centimeters, needed for the parachute?
a. 270 ≤ x ≤ 280
b. 4,860 ≤ x ≤ 4,870
c. 4,860 ≤ x ≤ 5,040
d. 5,030 ≤ x ≤ 5,040