PLZ HELP NEED SUBMITTED IN FEW MINUTES ANYTHING WILL HELP

Somone me i want to know what 18 hours out of 24 hours in a fraction

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

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.