Two equivalent ratios to 11 and 4 would be:
11 to 4, 11:4, and 11/4
Answer:



Step-by-step explanation:
Let
denote the half life of our substance
to be our time,
is mass at time t and
as initial mass. Our half life equation can be expressed as:
from which we can obtained mass at any given time.
b. From our equation above,
we can convert our t into mins as 
We then substitute
value into the equation

Hence mass after 4hrs is 
c. We can set our final mass to
then substitute in the equation
. Substitute 


Hence time until
mass is 109.83 minutes
Answer:
47.2
Step-by-step explanation:
236/5
47.5
Answer:
£2200
Step-by-step explanation:
1 computer = £120 + £100
1 computer = £220
10 computers = £220 x 10
10 computers = £2200
Answer:
(x−2)^3=x^3−6x^2+12x-8
Step-by-step explanation:
if you are talking about the binomial (x−2)^3 you must expand then simplify. (x-2)3 you would just remove the parenthesizes and multiply -2 with 3 to get x-6 but I think you meant (x-2)^3