Find the circumference.
Use 3.14 for pi
r = 4 cm
C = [?] cm
C=pi d

apply the formula::: C=2 pi r

c= 2×3.14×4

c= 25.12 cm

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %