Find the first partial derivatives of

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?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Tell whether the two rates form a proportion