A biologist studied the populations of white-sided jackrabbits and black-tailed jackrabbits over a 5-year period. The biologist modeled the populations, in thousands, with the following polynomials where x is time,
in years.
White-sided jackrabbits: 9.7x’ - 0.8x + 2.3
Black-tailed jackrabbits: -1.10 + 7.7r + 5.4
What polynomial models the total number of white-sided and black-tailed jackrabbits?
C.
1-8.6r? +6.9x - 7.7
b. 8.6x6.9.r + 7.7
8.6r +6.9x + 7.7
d. 8.6r -6.9.x - 7.7