When the air in a hot-air balloon is heated to 100 degrees Fahrenheit, each cubic foot of air can lift about 7 grams. The function f(x) for the number of grams that can be lifted by a balloon containing

asked May 10, 2017 132k views

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3 votes

Answer: f(x) = 7x

See this table

x [ ft^3 of air in the ballon] f(x) [grams that can be lifted]

1 7
2 14
3 21

Ben Gracewood answered May 15, 2017

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