How to express 7.5 million in expanded notation?

Nike lives in an area that has a south-facing slope. the temperature in his area is always high. which of these abiotic factors is responsible for high temperatures in nike’s area? a. nutrients b. soil c. water d. topography

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Which part of a mountain receives the majority of moisture due to the rain shadow effect? a. the leeward side b. the windward side c. the bottom of the mountain d. all parts of the mountain receive equal amounts of moisture.