8. Which of the following compounds is an ionic compound? (metal)
a. So3
b. BaF2
C. H20
d. co

b. BaF2

Explanation: Barium fluoride is an ionic compound. Since ionic compounds are composed of a metal which is Barium and a nonmetallic element which is Fluorine chemically combined together.

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.

thats a little if u want the answer just look it up on google thats what i do haha : )