A construction worker needs to determine the volume of a sandpile in a construction yard, as shown. •A line along the surface of the sandpile from the ground to the top of the sandpile makes a 50° angle with the ground at point R.

•The length of the slant side of the sandpile, RT, from the ground to the top of the sandpile is 30 meters.​

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step-by-step explanation:

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 %

the awnser is visionary

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