Emerald Robinson discussed whal chemists are interested in studying Which one of the following would a chemist probably not study? Select one O a. What a substance is made of O b. How atoms join in chemical bonds O c. How easily chemical bonds can be broken O d. How sound travels through a vacuum​

it is

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.

the solar system used to have much dust particles option no d