Ask Question
6 November, 09:48

The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground floor has 52 windows, how many total windows are on the first eight floors?

+3
Answers (1)
  1. 6 November, 10:14
    0
    The ground floor: 52 windows.

    We will use the arithmetic sequence:

    a 1 = 52

    d = - 6

    a n = a 1 + (n - 1) d

    a 8 = a 1 + 7 d

    a 8 = 52 + 7 * ( - 6) = 52 - 42 = 10

    S n = n/2 * (a 1 + a n)

    S 8 = 8/2 * (52 + 10) = 4 * 62 = 248

    Answer:

    There are 248 windows on the first eight floors.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “The windows of a downtown office building are arranged so that each floor has six fewer windows than the floor below it. If the ground ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers