The answer would be, correct me if I'm wrong, Geoff is 11 and Warden is 26...
I got this because if he's twice the age and he's 15 years older then he would be twice of 15 or 30, making Geoff 15 and Warden 30, subtract the 4 years from both and you get 11 and 16
Answer: c
Step-by-step explanation:
Call this piece of the plane S. Parameterize S by the vector function
s(u, v) = u i + v j + (28 - 2u - 3v)/4 k
with 1 ≤ u ≤ 4 and 2 ≤ v ≤ 6. Take the normal vector to S to be
∂s/∂u x ∂s/∂v = 1/2 i + 3/4 j + k
which has norm √((1/2)^2 + (3/4)^2 + 1^2) = √29/4
The area of S is then