How do i figure out the perimeter of a scale copy of a polygon if the scale factor is 2

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. what is the probability that the applicant who gets the job plays drums or guitar?

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer