Leyla drops a penny from a height of 150 m. how long will it take the penny to hit the ground? use the formula h(t)=−4.9t2+vot+h , where vo is the initial velocity and h is the initial height. round to the nearest tenth of a second. __s

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.