What is the length of arc S shown below? 5 cm
0.4
S
The angle in the figure is a central angle in radians.
cm

What is the slope of a line that is perpendicular to y = 3x + 1

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?