A balloon is tied to the ground with a 90 ft rope. A breeze blows on the balloon, causing it to hover at an unknown angle 80 ft above the ground. What is the angle
between the rope and the ground? Round to the nearest degree.

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 (%)