1. What is a product of petroleum used in dry cleaning? 2. What is a complex mixture of solid, liquid and gaseous hydrocarbons?

3. a) Define refining of petroleum.
b) What are the various products obtained from refining of petroleum? Write one use for each.

4. List the different types of coal with their carbon content and give one use for each.

5. What do you understand by global warming? Give any two consequences of global warming.​

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 food using pesticides in the future will harm you by giving you diseases like cancer or something since they have things that we should not eat in it like chemicals or pesticides. that is why organic food is more expensive because they take the time to make it right and healthy for you to eat.

explanation:

the answers would be

the first one and the second one