Question 1061054
Hi there,
t    -2  -1  0   1   2   3   4   5   6   7    8    9   10   11   12   13   14
No. 410 305 240 215 230 285 380 515 690 905 1160 1455 1790 2165 2580 3035 3530
By substituting t values into equation: 20t^2 - 45t + 240
Minimal number of bacteria occurs at t = 1 Number of bacteria = 215.
Hope this helps :-)