From a ship, the angle of elevation of a point a at the top of a cliff is 21. after the ship has sailed 2,500 feet directly toward the foot of the cliff, the angle of elevation of a is 47. find the height of the cliff. (round to the nearest whole number.)

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)