Find the surface area of a cone with a radius of 8 cm and a slant height of 17.9 cm round to the nearest tenth

Step-by-step explanation:

Given that,

Radius of cone, r = 8 cm

Slant height of the cone, l = 17.9 cm

We need to find the surface area of a cone. The a cone, its surface area is given by :

Putting the values of r and l in above formula such that,

So, the surface area of a cone is . Hence, this is the required solution.

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 %