Need help with trig hw.

3/18 WEEKLY ASSESSMENT: Answer on a piece of paper. Show ALL steps completely. NO WORK SHOWN, NO CREDIT! 1. A piece of commercial real estate is priced at $15.50 per square foot. Find the cost, to the nearest dollar, of a triangular lot measuring 90 feet by 80 feet by 30 feet. 2. Two ships leave a harbor at the same time. One ship travels on a bearing of $22W at 15 miles per hour. The other ship travels on a bearing of N51'E at 20 miles per hour. How far apart will the ships be after two hours? Round to the nearest tenth of a mile. 3. An observer on a cliff 600 ft above sea level sights two ships due East. The angles of depression to the ships are 30" and 25" What is the distance between the ships? 4. A plane leaves airport A and travels 950 miles to airport B on a bearing of N28'E. The plane later leaves airport Band travels to airport C 830 miles away on a bearing of S69'E. Find the distance from airport A to airport C to the nearest tenth of a mile