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1.6 Exponentials and logarithms

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Question 20

Jonathan is investigating the spread of a virus measured by the number of daily recorded cases $N$ . He believes $N = Ae^{kt}$ .

Express $\ln N\,$ in terms of $t$

[2]

Plot $\ln N\,$ against $t\,$ for this data:

$t$	8	11	18
$N$	12	24	90

[2]

Using the graph, estimate the value of $A\,$ and the value of $k$ .

[4]

Markscheme

1.6 Exponentials and logarithms Questions

A Level
Maths
1.6 Exponentials and logarithms

104 exam-style questions on WJEC A Level Maths 1.6 Exponentials and logarithms, covering 1.6.1 Exponentials and logarithms, 1.6.2 Exponentials and logarithms, 1.6.3 Exponentials and logarithms, 1.6.4 Exponentials and logarithms, 1.6.5 Exponentials and logarithms, 1.6.6 Exponentials and logarithms, 1.6.7 Exponentials and logarithms, 1.6.8 Exponentials and logarithms, and 1.6.9 Exponentials and logarithms. Each one has a worked solution and a mark scheme showing where the marks go.

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