Use the formula: SA = ah + 3aw

The triangle below is not drawn to scale. Use 4 in for all the sides. It is an equilateral triangle.

a
100 sq. in.
b
110 sq. in.
c
120 sq. in.
d
130 sq. in.

c: lkllmn.

hope it's you

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

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 %