Exponential Functions

NZ Level 7 (NZC) Level 2 (NCEA)

Applications of Exponential Functions (1 transform, positive base)

The formula $A=1000\times2^t$`A`=1000×2`t` models the population, $A$`A`, of aphids in a field of potato plants after $t$`t` weeks. Use this formula to solve the following questions.

a

What is the present aphid population?

b

What will the aphid population be in $5$5 weeks?

c

What was the aphid population $2$2 weeks ago?

Easy

Approx 2 minutes

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