
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
Decrease by 20%.
Step-by-step explanation:
We have to find the percent of increase or decrease from n to
.
Now,
So there is a decrease fro n to
.
Now, the percentage of decrease will be given by
=
=
= 20% (Answer)
Answer:
-9π
Step-by-step explanation:
∫c (4y dx + 2xy dy)
= ∫∫ [(∂/∂x)(2xy) - (∂/∂y)(4y)] dA, by Green's Theorem
= ∫∫ (2y - 4) dA
Now convert to polar coordinates:
∫(r = 0 to 3) ∫(θ = 0 to 2π) (2r sin θ - 4) * (r dθ dr) --- first integration
= ∫(r = 0 to 3) (-2r cos θ - 4θ) * r {for θ = 0 to 2π} dr
= ∫(r = 0 to 3) -2πr dr
= -πr² {for r = 0 to 3}
= -π(3²) - -π(0)²
= -9π
Answer:
And?
Step-by-step explanation: