The tip of a pendulum moves through an angle of 0.38 rad radians. if the radius of the pendulum is 25 centimeters then which of the following is the length of the arc the tip moves through

We know that
circumference=2*pi*r
for r=25 cm
so
circumference=2*pi*25> 50*pi cm

if
2*pi radians (full circle) has a length of> 50*pi cm
0.38 radians> x
x=0.38*50*pi/(2*pi)> x=9.5 cm

the answer is
9.5 cm

The correct answer is -20y

Think of it as five or above give it a shove. change the 5 or above to the right to a zero and add one to the number on the left.