SubArea: Applications of definite integralLevel: AProject ID: 1103068002Accepted: 1Clonable: 0Easy: 1Define an unknown real positive constant \( a \) so that the yellow surface indicated in the picture has an area of \( 9 \) square units.\( a=3 \)\( a=27 \)\( a=9 \)\( a=1 \)
