Answer: The beetle walks 17.1 inches longer than the ant.
Step-by-step explanation:
The radius of semicircle M is 15 inches, so its diameter (double the radius) is 30 inches.
The ant walks 30 inches.
The circumference of semicircle M is π multiplied by the diameter.
However, because M is a semicircle and not a circle, divide the circumference equation by 2 (because only half the circumference is there.)
The diameter is 30 inches.
[tex]\frac{30\pi }{2}[/tex] = 47.1238898038
Rounded to the nearest tenth of an inch, the "circumference" of semicircle M is 47.1 inches.
47.1 - 30
The beetle walks 17.1 inches longer than the ant.
