Answer:
sum = -15h+2
Step-by-step explanation:
This is the Equation: 2x + 6
The first working out is correct, z = 3
The function is:
B ( t ) = 4 * e^(0.8 t)
4 * e^(0.8 t) = 400
e^(0.8 t) = 400: 4
e^(0.8 t) = 100 / ln
ln e^(0.8 t) = ln 100 ( and since: ln e = 1 and ln e^x = x * ln e )
0.8 t = 4.6
t = 4.6 : 0.8 = 5.76 ≈ 6
Answer:
D ) 6 hours.
3 divided by 1/8 = <em>24 and 0/8</em>
