D E
45 km
18 km
A
21 km
B
What is the exact length of EC?
O 3,274 km
O 385 km
O 2 181 km
O 2v130 km

add a pic of the graph, then ill edit this "answer" and solve it for you : 3

step-by-step explanation:

i saw this question before, dont know the asnwer srry

step-by-step explanation:

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.