Abiologist studied the populations of black bear and brown bears over a 10 year period. the biologist modeled the populations, in thousands with the following polynomials where x is time , in years. black bears : 2.3x^2-5.6x+2.3 brown bears: 2.4x^2+7.2x+0.97 what polynomial models the total number of brown and black bears ? a.) 4.7x^2+1.6x+3.27 b.) 4.7x^2-1.6x-3.37 c.) 4.7x^2+1.6x-3.37 d.) 4.7x^2-1.6x+3.37 i need ? ?