If the surface area of the rectangular prism is 256cm what is the height

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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

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.