Formula of amount when interest and principal is given

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

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

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily