Interactive practice questions
Solve $v=u-a\ln t$v=u−alnt for $t$t.
Solve $r=\frac{u}{\ln t}-b$r=ulnt−b for $t$t.
Bart releases his new book on the $6$6th of January. The number of sales of the book per day since its release is displayed in the graph below.
From the first day of release onwards, the book enjoys a steady growth in sales.This growth is roughly modelled by the equation:
$f\left(t\right)=1483+93\ln t$f(t)=1483+93lnt
where $t$t is the number of days since the book's release.
Beth uploads a new video to her popular website.
The number of people viewing the video (in thousands) is roughly modelled by the equation:
$V=-180+57\ln x$V=−180+57lnx
where $x$x is the number of minutes since the video was upload.
The following table shows the number of people who have viewed the video (in thousands) at certain intervals (in minutes) since she completed the upload.