exam Maths Puzzle Numerical Ability

This is a homework problem that I cannot seem to solve. It states to:
Find the sum of the first 20 terms of the series

1 + 8 + 64 + 512 + . . .

Can you please help? Thank you in advance.

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exam Other Question

Find an example from your line of work or daily life that can be expressed as a linear equation with two variables. Graph this equation. please student in confusion....an object is projected upward from the top of tower. its distance in feet above the ground after t seconds is given by s(t)=-16t^2+64t+80. how many seconds will it take to reach ground.