Geothermal energy is heat from inside the earth. Underground temperatures generally increase 9°c for every 300 meters of depth. How deep would a well have rounded be for the temperature to reach 216°C​

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?