A shelf measures 720 mm long. a) How many centimetres long is the shelf?
b) How many metres long is the shelf?​

Given the following similar triangles what is the area of triangle b ? a) 1 b)1.8 c)3.2 d)5

Can some one me with these questions

Explain how you divide powers with like bases. discuss why the bases have to be the same. how are these rules similar to the rules for multiplying powers with like bases.