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Convert 40.64 centimeters to inches. [type your answer as a number.] 1 inch ≈ 2.54 centimeters

As of mid-2016, the world's population was about 7.4 billion people. the population of the united states was 324 million. the land area of a certain state is about 261,719 square miles. if in mid-2016 all of the world's people were put into that state, how many people would there be in each square mile? (round your answer to the nearest whole number.)

Lidia’s parents have offered her two different options to earn her allowance for a 9 week period over the summer. she can either get paid 30$ each week, or 1$ each week,2$ the second week,4$ the third week, and so on