book Maths Puzzle Numerical Ability

In a walkathon to raise money for a charity, Elisa walked a certain distance at 5mi/h and then jogged twice that distance at 8mi/h. Her total time walking and jogging was 2 hours

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book Other Question
x^3+x^2+2x+2

and

2x^3+8x^2-9x+36 Mrs.Ellis is setting up an annuity for her retirement. She can set aside $2,000 at the end of the year for the next twenty years and it will earn 6% annual interest. What lump sum