Final answer:
To find Marsha's height in centimeters, we can use the given information that the number of centimeters varies directly with the number of inches. Setting up a proportion, Marsha's height is approximately 162.56 cm.
Step-by-step explanation:
To find Marsha's height in centimeters, we can use the given information that the number of centimeters y varies directly with the number of inches x. We can set up a proportion using this relationship:
y/152.4 = x/60
Since Marsha's height is 64 inches, we substitute x = 64 into the proportion and solve for y:
y/152.4 = 64/60
y = (64/60) * 152.4
y ≈ 162.56 cm