R is inversely proportional to A. R=12 when A=1.5.
work out the value of R when A=5

R=3.6

Step-by-step explanation:

R=k/A

When R=12, A=1.5

12=k/1.5

k=1.5×12

k=18

To determine R when A =5

R=18/5

R=3.6

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).