. Constructing a Brick Staircase A brick staircase has a totalof 25 steps. The bottom step requires 80 bricks. Each stepthereafter requires three fewer bricks than the prior step.(a) How many bricks are required for the top step?(b) How many bricks are required to build the staircase?

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
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Chapter8: Sequences, Series,and Probability
Section8.2: Arithmetic Sequences And Partial Sums
Problem 72E: A triangular brick wall is made by cutting some bricks in half to use in the first column of every...
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. Constructing a Brick Staircase A brick staircase has a total
of 25 steps. The bottom step requires 80 bricks. Each step
thereafter requires three fewer bricks than the prior step.
(a) How many bricks are required for the top step?
(b) How many bricks are required to build the staircase?

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