Find the radius of a circle in which the central angle of (pie /4 ) radian determines a sector with an area of 86m^2

a-14.80m
b-20.92m
c-68.44 m
d- 10.46m

Idon't want to fail summer school.the probabilities of contamination in medicine capsules due to the presence of heavy metals and different types of microbes are given in the table.the probability of capsule b having microbial contamination is (the same as, greater than, less than) the probability of capsule d having it.