5/25 = 13/?

can you me with this question.

Two fire-lookout stations are 190 miles apart, with station a directly south of station b. both stations spot a fire. the bearing of the fire from station a is upper n 55 degrees upper e and the bearing of the fire from station b is upper s 60 degrees e. how far, to the nearest tenth of a mile, is the fire from each lookout station?

Which expression gives the area of the triangle shown below

What ia the sum if the first 7 terms of the geometric series