I believe it would be the 3rd one. (r=41/2) which is (radius=diameter/2)
~Hope This Helps~
A shopkeeper marks:
$200 * 1.4 = $280
With a discount of 25%:
$280 * 0.75 = $210
Answer:

Step-by-step explanation:
Given

Required
Evaluate when:

When 
The expression is:


When t = 20
The expression is:


When 
The expression is:


The result is:

Answer:
If you get the answer tell me.
Answer:
2x^2=3x+2
2x^2-3x-2=0
(x-2)(x+1/2)=0
x=2 or x=-1/2
The sum of 2 solution 2+-1/2=3/2
Step-by-step explanation: