book Maths Puzzle Numerical Ability

Hello - Could a tutor please help me with the below problem. I don't even know where to start! In advance, thanks for your assistance!

Write the partial fraction decompositi

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Old Isaac dropped from his perch on Mrs. Cohen's window ledge 25 feet above ground. Teh equation h=16t*2+25 gives Isaac's height above the ground in feet as a function of time, t, On a shelf there are four mathematic books and eight english books. if the books are to be arranged so that the mathematics books are together, in how many ways can this be done?