1. lava cooled over several years it forms fertile soil good for growing of some crops like cotton
2. volcanic features are good tourists attractions brings in foreign currency
3. precious stones like diamond and copper are found at volacanic sites
4. water heated at volcanic sites supply homes and industries saving alot of money ethermal energy
goo
Yes. The area of the wall is 2x4.5=9m^2, and you have enough to cover 10m^2. So you will have more than enough.
Where is the map for this question?
I can't tell you the answer because there is no image but to find a perpendicular lines slope you just take the slope and make it opposite.
Ex: Slope is 1/2 what is the perpendicular?
Ans: -2/1