Hey anyone if you can help me with this its on word and its for math

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?

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?

Three runners competed in a race data were collected at each mile mark for each runner if the runner ran at a constant pace the data would be linear