Question #bcd5f Calculus Using Integrals to Find Areas and Volumes Calculating Areas using Integrals 1 Answer Noah G Oct 9, 2016 Let the length of the fence be #x# and the width be #y#. #2x+ 2y = 70# #2y = 70 - 2x# #y = 35 - x# Let #A# be the area of the pen. #A = "length" xx "width"# #A = x(35 - x)# #A = -x^2 + 35x# Hopefully this helps! Answer link Related questions How do you find the area of circle using integrals in calculus? How do you find the area between two curves using integrals? How do you find the area of an ellipse using integrals? How do you find the area under a curve using integrals? How do you find the area of the region between the curves #y=x-1# and #y^2=2x+6# ? How do you find the area of the region bounded by the curves #y=sin(x)#, #y=e^x#, #x=0#, and #x=pi/2# ? How do you find the area of the region bounded by the curves #y=1+sqrt(x)# and #y=1+x/3# ? How do you find the area of the region bounded by the curves #y=|x|# and #y=x^2-2# ? How do you find the area of the region bounded by the curves #y=tan(x)# and #y=2sin(x)# on the... How do I find the area between the curves #y=x^2-4x+3# and #y=3+4x-x^2#? See all questions in Calculating Areas using Integrals Impact of this question 1342 views around the world You can reuse this answer Creative Commons License