Check my work and answer. question: what is the function for the difference of area between a sphere with radius r+1 and a sphere with radius r? one hundred points!

  you have used the volume formula when the problem asks for a difference of area.

  ΔA = 4π(2r+1) = 8πr +4π

Step-by-step explanation:

  A(r) = 4πr²

  ΔA = A(r+1) - A(r) = (4π(r+1)²) -4πr² = 4π(r² +2r +1 - r²)

  ΔA = 4π(2r +1) = 8πr +4π

8πr + 4π

Step-by-step explanation:

Your mistake in solving this problem was using the formula for volume rather than find the difference in area.

a(r) = 4πr^2

a = a(r + 1) - a(r)

a = [4π(r + 1)^2]

a = 4π(r^2 - r^2 + 2r + 1)

a = 4π(2r + 1)

a = 8πr + 4π

Best of Luck!

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation: