If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Get ready for AP® Calculus

Unit 9: Lesson 5

Geometric series
Math
Get ready for AP® Calculus
Get ready for infinite sequences and series (BC only)
Geometric series
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

Finite geometric series word problems

CCSS.Math: HSA.SSE.B.4
Google Classroom
You might need: Calculator

Problem

A new shopping mall records 120 total shoppers on their first day of business. Each day after that, the number of shoppers is 10, percent more than the number of shoppers the day before.
What is the total number of shoppers that visited the mall in the first 7 days?
Round your final answer to the nearest integer.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
shoppers
Stuck?
Stuck?