What does 1.5e+ 1 1 mean?

This formula means 1.5 times 1 1 to the power of1.

1.5e+ 1 1 is a form of scientific notation, which represents the mathematical expression under scientific notation, that is, 1.5 multiplied by 1 1 to the power of1in scientific notation. 1.5e+ 1 1 is a shorthand method for scientific counting, namely 1500000000.

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