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

Algebra 1

Course: Algebra 1 > Unit 12

Lesson 4: Exponential vs. linear growth over time
Math
Algebra 1
Exponential growth & decay
Exponential vs. linear growth over time
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

Exponential vs. linear growth over time

Google Classroom
You might need: Calculator

Problem

Lucia and Maria are business women who decided to invest money by buying farm land in Brazil.
  • Lucia bought 11 hectares of land in the first month, and each month afterwards she buys 5 additional hectares.
  • Maria bought 6 hectares of land in the first month, and each month afterward her total number of hectares increases by a factor of 1, point, 4.
They started their investments at the same time, and they both buy the additional land at the beginning of each month.
What is the first month in which Maria's amount of land exceeds Lucia's amount of land?
  • 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
Stuck?
Stuck?