Write this expression in simplest form. 256h^10

What is the perimeter of square abcd? units units 28 units 37 units

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 (%)

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.