Question

Please help me I'll give brainliest

Answer 1

I believe it’s c. :))

Answer 2

Answer:  The last choice is correct $\frac{9}{\sin\left(60\right)}$

Step-by-step explanation: The information given in the diagram: AB is the hypotenuse of a right triangle, and the side opposite the 60° angle is 9 feet. you can use sine = 0pposite/Hypotenuse

You can find the sine of 60° which is the value of the ratio of the opposite side to the (unknown) hypotenuse.  sin 60° = 0.866

You can set up the equation on a scientific calculator as $\frac{9}{\sin\left(60\right)}$  but to see the logic use the value   0.866 = 9/h

reorganize to solve for h: divide both sides by 0.866 and multiply both by h to get  

h = 9/0.866   solving that you get the length of AB

h = 10.393, which, rounded, is a logical length for the brace on the gate:

 10.4 feet