How acute, flat, obtuse and right angles are used and what they work for in astronomy?

Someone me what is the area of this figure? 18m 18m 8m 16m

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

Find the rate at which the water is now flowing from the tap give your answer cubic centimetres per second