Which functions have real zeros at 1 and 4? Check all that apply.
f(x) = x2 + x +4
f(x) = x2 - 5x + 4
f(x) = x2 + 3x - 4
f(x) = -2x2 + 10x - 8
f(x) = -4x2 - 16x-1

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.