the picture below shows a portion of a river dam:

which of the following can be used to calculate the height of the river dam

The height of the river dam is 83.9 m

Step-by-step explanation:

Given : AB is the height of the river dam

           ∠ACB=40°

           BC = 100 m

To Find: The height of river dam i.e. AB

Solution:

Refer the attached file.

Perpendicular = AB

Base = BC = 100

To find the height of the river dam we will use trigonometric ratio.

Hence the height of the river dam is 83.9 m

yess

step-by-step explanation:

idk whyy this is happening, i cant even read my notification bc i keep getting errors

~coco

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.