Still Confused?

Try reviewing these fundamentals first

- Home
- AU Year 12 Maths
- Applications of Exponential and Logarithmic Functions

Still Confused?

Try reviewing these fundamentals first

Still Confused?

Try reviewing these fundamentals first

Nope, got it.

That's the last lesson

Start now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started Now- Lesson: 19:41

The growth/decay factor "(1+r)" dictates the rate of exponential growth and decay. We will work on questions related to growth/decay factor in this lesson.

Related Concepts: Derivative of inverse trigonometric functions, Derivative of logarithmic functions

exponential growth/decay: ${ A_f = A_i (f)^{time\over period}}$

${A_f}$: final amount

${A_i}$: initial amount

${f }$ : growth/decay factor

half-time$\to f = {1\over 2}$

triple$\to f = {3}$

ten-fold$\to f = {10}$

increase by 10%$\to f = {({1 + {10\over 100}}) } { = 1.1}$

decrease by 8%$\to f = {({1 - {8\over 100}}) } { = 0.92}$

${time}$ : total time given

${period}$ : every length of time

${A_f}$: final amount

${A_i}$: initial amount

${f }$ : growth/decay factor

half-time$\to f = {1\over 2}$

triple$\to f = {3}$

ten-fold$\to f = {10}$

increase by 10%$\to f = {({1 + {10\over 100}}) } { = 1.1}$

decrease by 8%$\to f = {({1 - {8\over 100}}) } { = 0.92}$

${time}$ : total time given

${period}$ : every length of time

- 1.triple growth

A certain type of bug can triple its population every 10 years.

How many bugs will there be in 50 weeks if there are 76 bugs today?

13.

Applications of Exponential and Logarithmic Functions

13.1

Exponential growth and decay by a factor

13.2

Exponential decay: Half-life

13.3

Exponential growth and decay by percentage

13.4

Finance: Compound interest

13.5

Continuous growth and decay

13.6

Logarithmic scale: Richter scale (earthquake)

13.7

Logarithmic scale: pH scale

13.8

Logarithmic scale: dB scale

13.9

Finance: Future value and present value

We have over 1040 practice questions in AU Year 12 Maths for you to master.

Get Started Now13.1

Exponential growth and decay by a factor

13.2

Exponential decay: Half-life

13.3

Exponential growth and decay by percentage

13.4

Finance: Compound interest

13.5

Continuous growth and decay

13.6

Logarithmic scale: Richter scale (earthquake)

13.7

Logarithmic scale: pH scale

13.8

Logarithmic scale: dB scale

13.9

Finance: Future value and present value