Final answer:
Kelly needs 14.4 feet of wood to make the rungs for one ladder, by multiplying the 9 rungs by the length of each rung, which is 1.6 feet.
Step-by-step explanation:
To find out how many feet of wood are needed to make the rungs for one ladder, we need to multiply the number of rungs by the length of each rung. Kelly's ladder has 9 rungs and each rung is 1.6 feet in length.
Calculation:
Number of rungs × Length of each rung = Total feet of wood needed
9 rungs × 1.6 feet per rung = 14.4 feet
So, Kelly will need 14.4 feet of wood to make the rungs for one ladder. The correct answer is a) 14.4 feet.