Initial number of Bacteria = Ao = 100
Number of Bacteria which make the person ill = A = 45,000,000
Growth rate = r = 150% = 1.50
The equation model for this situation is:

Using the values in above equation, we can write:
This means, the person will fall sick after about 14 hours.
100% markup means the price is double what it was bought for, $30. 30x2=60 dollar sale price. A 20% commision would be $12. 60 x 0.2=12
F(x) = |x| + 4
f(0) = I 0 I + 4===> (0,4)
f(0) = - 0 +4 ===> (0,4)
If you are talking about building blocks, then you would get one 10 and 3 ones, then subtract that from 7 ones and would get 6