Last year, John earned $7.50 per hour working at a video store. This year, he is earning $8.10 at the same job. By what percent did John's hourly rate increase? ​

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration

What happens when heat from inside earth is transferred to its surface? warmer material is pushed to the crust more dense material is pushed to the crust warmer material is pushed to the outer core less dense material is pushed to the outer core

Which of the following situations is most likely to arise when a crowded city is unable to provide its residents with sufficient sanitation?