Is this a right triangle? 16 14 8 Yes No​

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.