Why is aluminium used in circuit boards and batteries of mobile phones​

How can you construct perpendicular lines and prove theorems about perpendicular lines

Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 150, 120, 136, 180, 158, 175, 124, 162 minimum maximum median upper quartile lower quartile

Can anyone explain to me how to do this? anything will .