Lesson on Geometric Growth and Decay

Which of the following graphs could be modelled using a geometric sequence?

• A

• B

• C

• D

Tags

CCSS.HSF-IF.C.7E

The fourth, fifth and sixth terms of a geometric sequence are 7.5, 3.75 and 1.875 respectively. The sum of the first and second terms in the geometric sequence is:

• 15

• 30

• 45

• 90

Tags

CCSS.HSF.BF.A.2

A scientist observed that the population of a specific bird species is decreasing by 17% each year and that at the beginning of 2016, there were 483 birds. Predict the number of birds remaining at the beginning

of 2021.

Tags

CCSS.HSF-LE.A.1C

Use the recursive rule 𝑡_n+1 = 0.65𝑡_n, t₁ = 120 to complete the following.

Calculate the percentage by which each term decreases

Tags

CCSS.HSF.BF.A.2

Use the recursive rule 𝑡_n+1 = 0.65𝑡_n, t₁ = 120 to complete the following.

Calculate the fourth term rounded to the nearest whole number.

Tags

CCSS.HSF.BF.A.2

P2 BONUS QUESTION: t₃ = 90, t₅ = 57.6. What is the first term (round answer to nearest whole number)?

Tags

CCSS.HSF.BF.A.2