Answer:
Area = 131.9167322
Step-by-step explanation:
I'm not sure what 2 DP means so you will need to do that part.
area=pi*radius^2
area=3.14*42 (approx)
In terms of its radius 
, the volume of the balloon is
The diameter 
is twice the radius, so that in terms of its diameters, the balloon's volume is given by
Differentiate both sides with respect to time 
:
The diameter increases at a rate of 
. When the diameter is 
, we have
or about 23,562 cc/min (where cc = cubic centimeters)
Explanation:
To answer a question like this, refer to the definitions of the functions:
(f-g)(200) is ...
... the difference between the amount of money a cell phone screen is being sold for and the cost of production, when 200 screens are being manufactured.
__
The numerical value of (f-g)(200) is ...
f(200) -g(200) = (3·200 +5000) -(20·200 -400) = 5600 -3600
(f-g)(200) = 2000
- - To find a "what number is x% of x"
You have to first change 35% into a decimal.
35%=0.35
Now 0.35*22=7.7
Therefore your final answer is 7.7
