You text them to tell them that you are no longer BFFs, but the planet is on the far side of the sun compared to earth - 378 million km away. The radio signal carrying your message travels at the speed of light: 3.0 x 108 m/s. Assuming perfect communication transmission to and from Mars, when's the
earliest you could expect to receive their reply to your message?
Your final answer should be expressed in a sentence or two, and given in minutes and seconds, without any decimals (there is no such

african americans demonstrated their newly found freedom by relocating often in search of relatives whom they had been separated from during slavery. others established schools to educate freed people and they built institutions such as churches and political organizations to advocate for their rights.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

fe 55.85 g/mol and h2o 18.02 g/mol.