a From a circular aluminium sheet of radius 14 cm, a sector of angle 45° is removed. Find the percent- age of the area of the sector removed.

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

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 (%)

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