8. Hard-boiled eggs are easy to make and are a handy snack to have around the house. Just drop the whole egg into boiling water and seven minutes later you have a hardboiled egg with a soft yolk
center. The longer you cook the egg, the firmer the egg yolk becomes. When the yolk hardens, a
greyish layer of iron (ll) sulfide forms on the surface of the yolk. This compound is a result of the
iron in the yolk reacting with the hydrogen sulfide gas (H2S) released by the egg white. Hydrogen
gas (Hz) is also produced. The chemical formula for iron (II) sulfide is FeS and it is safe to eat.
Word equation
Chemical equation:

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.

20 drops hope this

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.