Answer:
a=6.9
Step-by-step explanation:
Since you know that C is a right angle, you can use the Law of Sines to find a. The first step is to find the size of the angle A, which is 180-74-90=16. Now, you set up a ratio that involves 3 knowns and one unknown to get [tex]\frac{\sin(90^\circ)}{25} = \frac{\sin(16^\circ)}{a}[/tex], which after cross multiplying yields [tex]a=\sin(16^\circ)\cdot25\approx 6.9[/tex]. PM me if you have any questions?
