Find the area and circumference of a circle with a diameter of 30 ft

Step-by-step explanation:

The formula of a circumference of a circle:

d - diameter

The formula of an area of a circle:

r - radius

We have the diameter d = 30 ft. We know d= 2r.

Therefore r = 30 : 2 = 15 ft.

Substitute:

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 %