Which composition of similarity transformation maps lmn to l’m’n’

Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π